Twilio Outage History

Started Aug 18, 2026, 06:28 PM UTC· resolved Aug 18, 2026, 09:00 PM UTC

1. investigating Aug 18, 2026, 05:10 PM UTC

   We are aware of login failures affecting Flex when using SSOv2 authentication. Customers may experience errors related to rate limiting when attempting to access Flex. Our team is actively investigating. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 18, 2026, 06:11 PM UTC

   We are aware of login failures affecting Flex when using SSOv2 authentication. Customers may experience errors related to rate limiting when attempting to access Flex. Our team is actively investigating. We will provide another update in 2 hours or as soon as more information becomes available.

3. monitoring Aug 18, 2026, 06:28 PM UTC

   Flex login when using SSOv2 authentication is now operating normally. We will continue to monitor for system stability. If you experience continued login failures, please clear your browser cache and cookies. We'll provide another update in 30 minutes or as soon as more information becomes available.

4. identified Aug 18, 2026, 06:56 PM UTC

   We are seeing another uptick in login failures affecting Flex when using SSOv2 authentication. Customers may experience errors related to rate limiting when attempting to access Flex. Our team is actively investigating. We will provide another update in 1 hour or as soon as more information becomes available.

5. identified Aug 18, 2026, 07:57 PM UTC

   We are still seeing another uptick in login failures affecting Flex when using SSOv2 authentication. Customers may experience errors related to rate limiting when attempting to access Flex. Our team is actively investigating. We will provide another update in 2 hours or as soon as more information becomes available.

6. monitoring Aug 18, 2026, 08:35 PM UTC

   We have identified the cause of the issue causing failures when attempting to login to Flex via SSO and have applied mitigations. Customers can login to Flex via SSO as normal. We will provide another update in 30 minutes or as soon as more information becomes available.

7. resolved Aug 18, 2026, 09:00 PM UTC

   Customers can login to Flex via SSO as normal. This incident has been resolved.

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Started Aug 18, 2026, 05:13 PM UTC· resolved Aug 18, 2026, 08:34 PM UTC

1. investigating Aug 18, 2026, 05:13 PM UTC

   We are aware of login failures affecting the Twilio Console application. Customers are unable to access their accounts. Our team is actively investigating. We will provide another update in 15 minutes or as soon as more information becomes available.

2. investigating Aug 18, 2026, 05:28 PM UTC

   We are aware of login failures affecting the Twilio Console application. Customers are unable to access their accounts. Our team is actively investigating. We will provide another update in 30 minutes or as soon as more information becomes available.

3. investigating Aug 18, 2026, 05:58 PM UTC

   We are aware of login failures affecting the Twilio Console application. Customers are unable to access their accounts. Our team is actively investigating. We will provide another update in 30 minutes or as soon as more information becomes available.

4. monitoring Aug 18, 2026, 06:34 PM UTC

   Twilio Console application login is now operating normally. We will continue to monitor for system stability. If you experience continued login failures, please clear your browser cache and cookies. We'll provide another update in 30 minutes or as soon as more information becomes available.

5. monitoring Aug 18, 2026, 07:04 PM UTC

   Twilio Console application login is now operating normally. We will continue to monitor for system stability. If you experience continued login failures, please clear your browser cache and cookies. We'll provide another update in 30 minutes or as soon as more information becomes available.

6. resolved Aug 18, 2026, 08:34 PM UTC

   Our engineers have monitored the fix and confirmed the issue with Twilio Console application login is now operating normally. This incident has been resolved.

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Started Aug 18, 2026, 02:56 PM UTC· resolved Aug 18, 2026, 04:35 PM UTC

1. investigating Aug 18, 2026, 02:56 PM UTC

   Twilio customers may be experiencing voice call failures from network subscribers to Twilio United States Phone Numbers. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 18, 2026, 03:57 PM UTC

   Twilio customers may be experiencing voice call failures from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Aug 18, 2026, 03:58 PM UTC

   Twilio customers may be experiencing voice call failures from T-Mobile network subscribers in the United States to a subset of Twilio United States Phone Numbers. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

4. resolved Aug 18, 2026, 04:35 PM UTC

   We have completed our investigation and determined that this event did not result in any customer impact. All systems are operating normally.

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Started Aug 18, 2026, 02:30 PM UTC· resolved Aug 18, 2026, 10:14 PM UTC

1. investigating Aug 18, 2026, 02:30 PM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from Twilio Phone Numbers to Claro network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 18, 2026, 03:30 PM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from Twilio Phone Numbers to Claro network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. investigating Aug 18, 2026, 05:31 PM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from Twilio Phone Numbers to Claro network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

4. monitoring Aug 18, 2026, 08:14 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Claro network subscribers in Brazil and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

5. resolved Aug 18, 2026, 10:14 PM UTC

   The incident has been resolved and SMS delivery from Twilio Phone Numbers to Claro network subscribers in Brazil is operating normally.

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Started Aug 18, 2026, 10:14 AM UTC· resolved Aug 18, 2026, 04:02 PM UTC

1. investigating Aug 18, 2026, 10:14 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to Lycamobile network subscribers in the United Kingdom. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 18, 2026, 11:18 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to Lycamobile network subscribers in the United Kingdom. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. monitoring Aug 18, 2026, 12:15 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Lycamobile network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

4. monitoring Aug 18, 2026, 02:18 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Lycamobile network subscribers in the United Kingdom and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

5. resolved Aug 18, 2026, 04:02 PM UTC

   The incident has been resolved and SMS delivery from Twilio to Lycamobile network subscribers in the United Kingdom is operating normally.

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Started Aug 18, 2026, 12:33 AM UTC· resolved Aug 18, 2026, 07:49 PM UTC

1. investigating Aug 18, 2026, 12:33 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Free Caraibe network subscribers in Martinique. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 18, 2026, 12:38 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Free Caraibe network subscribers in Martinique. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Aug 18, 2026, 01:17 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Free Caraibe network subscribers in France. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

4. identified Aug 18, 2026, 02:17 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Free Caraibe network subscribers in France. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

5. identified Aug 18, 2026, 04:18 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Free Caraibe network subscribers in France. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

6. identified Aug 18, 2026, 08:24 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Free Caraibe network subscribers in France. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

7. monitoring Aug 18, 2026, 02:17 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Free Caraibe network subscribers in France and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

8. monitoring Aug 18, 2026, 04:25 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Free Caraibe network subscribers in France and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

9. resolved Aug 18, 2026, 07:49 PM UTC

   The incident has been resolved and SMS delivery from Twilio to Free Caraibe network subscribers in France is operating normally.

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Started Aug 17, 2026, 11:03 PM UTC· resolved Aug 17, 2026, 11:03 PM UTC

1. resolved Aug 17, 2026, 11:03 PM UTC

   Between 2:45 AM PT and 2:50 AM PT, a minority of delivery receipts for messages were lost. This incident has been resolved.

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Started Aug 17, 2026, 09:57 PM UTC· resolved Aug 17, 2026, 10:07 PM UTC

1. investigating Aug 17, 2026, 09:57 PM UTC

   Our monitoring systems have detected a potential issue with Programmable messaging API returned 503s to customers. Our engineers have been alerted and are investigating. We will provide an update when we have more details.

2. resolved Aug 17, 2026, 10:07 PM UTC

   Between 13:25 PST and 13:27 PST, customers may have received an elevated rate of HTTP 503s when sending messages via the Programmable Messaging API. The issue has been resolved.

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Started Aug 17, 2026, 09:26 PM UTC· resolved Aug 18, 2026, 06:06 AM UTC

1. investigating Aug 17, 2026, 09:26 PM UTC

   Twilio customers may be experiencing voice call audio quality degradation from a subset of Twilio Phone Numbers to network subscribers in Turkey. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 17, 2026, 09:30 PM UTC

   Twilio customers may be experiencing voice call audio quality degradation from a subset of Twilio Phone Numbers to network subscribers in Turkey. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Aug 17, 2026, 10:30 PM UTC

   Twilio customers may be experiencing voice call audio quality degradation from a subset of Twilio Phone Numbers to network subscribers in Turkey. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

4. identified Aug 18, 2026, 12:31 AM UTC

   Twilio customers may be experiencing voice call audio quality degradation from a subset of Twilio Phone Numbers to network subscribers in Turkey. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

5. monitoring Aug 18, 2026, 03:45 AM UTC

   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to network subscribers in Turkey and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

6. monitoring Aug 18, 2026, 05:45 AM UTC

   We have observed a recovery in voice calls from Twilio Phone Numbers to network subscribers in Turkey and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

7. resolved Aug 18, 2026, 06:06 AM UTC

   The incident has been resolved and voice calls from a subset of Twilio Phone Numbers to network subscribers in Turkey are operating normally.

Read the full incident report →

Started Aug 17, 2026, 06:54 PM UTC· resolved Aug 17, 2026, 10:34 PM UTC

1. investigating Aug 17, 2026, 06:54 PM UTC

   Twilio customers may be experiencing User Authentication Identity SNA failure increase for AT&T in the United States. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 17, 2026, 07:09 PM UTC

   Twilio customers may be experiencing User Authentication Identity SNA failure increase for AT&T in the United States. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Aug 17, 2026, 08:16 PM UTC

   Twilio customers may be experiencing User Authentication Identity SNA failure increase for AT&T in the United States. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

4. monitoring Aug 17, 2026, 10:04 PM UTC

   We have observed a recovery in User Authentication Identity SNA failure increase for AT&T in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

5. resolved Aug 17, 2026, 10:34 PM UTC

   The incident has been resolved and User Authentication Identity SNA failure increase for AT&T in the United States is operating normally.

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Started Aug 17, 2026, 02:32 PM UTC· resolved Aug 17, 2026, 05:37 PM UTC

1. investigating Aug 17, 2026, 02:32 PM UTC

   Engineering is currently investigating issues regarding Twilio Console in Conversation Intelligence Classic. Customers may experiences delays seeing their transcripts become available for view.

2. monitoring Aug 17, 2026, 02:54 PM UTC

   A fix has been implemented and we are monitoring the results.

3. resolved Aug 17, 2026, 05:37 PM UTC

   This incident has been resolved.

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Started Aug 17, 2026, 10:49 AM UTC· resolved Aug 17, 2026, 05:27 PM UTC

1. investigating Aug 17, 2026, 10:49 AM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from Twilio to DiGi network subscribers in Malaysia. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 17, 2026, 10:53 AM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from Twilio Phone Numbers to DiGi network subscribers in Malaysia. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. monitoring Aug 17, 2026, 11:19 AM UTC

   We have observed a recovery in SMS delivery from Twilio to DiGi network subscribers in Malaysia and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

4. monitoring Aug 17, 2026, 01:20 PM UTC

   We have observed a recovery in SMS delivery from Twilio Phone Numbers to DiGi network subscribers in Malaysia and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

5. resolved Aug 17, 2026, 05:27 PM UTC

   The incident has been resolved and SMS delivery from Twilio to DiGi network subscribers in Malaysia is operating normally.

Read the full incident report →

Started Aug 17, 2026, 06:24 AM UTC· resolved Aug 17, 2026, 10:08 AM UTC

1. investigating Aug 17, 2026, 06:24 AM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Short Codes to Claro network subscribers in Colombia. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 17, 2026, 07:00 AM UTC

   Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Short Codes to Claro network subscribers in Colombia. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. monitoring Aug 17, 2026, 08:05 AM UTC

   We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to Claro network subscribers in Colombia and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

4. resolved Aug 17, 2026, 10:08 AM UTC

   The incident has been resolved and SMS delivery from a subset of Twilio Short Codes to Claro network subscribers in Colombia is operating normally.

Read the full incident report →

Started Aug 16, 2026, 11:36 PM UTC· resolved Aug 18, 2026, 09:03 AM UTC

1. investigating Aug 16, 2026, 11:36 PM UTC

   Twilio customers may be experiencing voice call post dial delay from a subset of Twilio Mobile Numbers to network subscribers in Iraq. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 16, 2026, 11:44 PM UTC

   Twilio customers may be experiencing voice call post dial delay from a subset of Twilio Mobile Numbers to network subscribers in Iraq. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Aug 17, 2026, 12:45 AM UTC

   Twilio customers may be experiencing voice call post dial delay from Twilio Mobile Numbers to network subscribers in Iraq. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

4. identified Aug 17, 2026, 02:46 AM UTC

   Twilio customers may be experiencing voice call post dial delay from a subset of Twilio Mobile Numbers to network subscribers in Iraq. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

5. identified Aug 17, 2026, 06:47 AM UTC

   Twilio customers may be experiencing voice call post dial delay from a subset of Twilio Mobile Numbers to network subscribers in Iraq. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

6. identified Aug 17, 2026, 03:00 PM UTC

   Twilio customers may be experiencing voice call post dial delay from a subset of Twilio Phone Numbers to network subscribers in Iraq. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

7. monitoring Aug 18, 2026, 06:13 AM UTC

   We have observed a recovery in voice calls from a subset of Twilio Mobile Numbers to network subscribers in Iraq and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

8. monitoring Aug 18, 2026, 08:14 AM UTC

   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to network subscribers in Iraq and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

9. resolved Aug 18, 2026, 09:03 AM UTC

   The incident has been resolved and voice calls from a subset of Twilio Phone Numbers to network subscribers in Iraq are operating normally.

Read the full incident report →

Started Aug 16, 2026, 09:20 PM UTC· resolved Aug 18, 2026, 05:20 AM UTC

1. investigating Aug 16, 2026, 08:28 PM UTC

   We are investigating a service interruption with Interconnect in the Frankfurt edge. We expect to provide another update in 1 hour or as soon as more information becomes available.

2. monitoring Aug 16, 2026, 09:20 PM UTC

   Interconnect in the Frankfurt edge is now operating normally. We will continue to monitor for system stability. We'll provide another update in 30 minutes or as soon as more information becomes available.

3. monitoring Aug 17, 2026, 03:13 AM UTC

   We continue to monitor the issue related to elevated errors impacting Interconnect in Frankfurt Edge. We will provide an update as soon as more information becomes available.

4. monitoring Aug 17, 2026, 05:04 AM UTC

   We continue to monitor the issue related to elevated errors impacting Interconnect in Frankfurt Edge. We will provide an update as soon as more information becomes available.

5. monitoring Aug 17, 2026, 09:10 AM UTC

   We continue to monitor the issue related to elevated errors impacting Interconnect in Frankfurt Edge. We will provide an update as soon as more information becomes available.

6. monitoring Aug 17, 2026, 11:57 AM UTC

   We continue to monitor the issue related to elevated errors impacting Interconnect in the Frankfurt Edge. While investigating the current impact, we noticed that a subset of France numbers is affected. We will provide an update as soon as more information becomes available.

7. monitoring Aug 17, 2026, 12:58 PM UTC

   We continue to monitor the issue related to elevated errors impacting Interconnect in the Frankfurt Edge, as well as inbound voice calls to France numbers. Both services have been moved to active monitoring as we evaluate performance. We will provide an update as soon as more information becomes available.

8. monitoring Aug 17, 2026, 02:57 PM UTC

   We are continuing to monitor the issue related to elevated errors impacting Interconnect in the Frankfurt Edge, as well as inbound voice calls to France numbers. Both services have been moved to active monitoring as we evaluate performance. We will provide an update as soon as more information becomes available.

9. monitoring Aug 17, 2026, 05:39 PM UTC

   We are continuing to monitor the issue related to elevated errors impacting Interconnect in the Frankfurt Edge, as well as inbound voice calls to France numbers. Both services are in active monitoring as we evaluate performance. We will provide an update as soon as more information becomes available.

10. monitoring Aug 17, 2026, 07:56 PM UTC

    Our engineers have implemented a fix and are monitoring system performance related to elevated errors impacting Interconnect in the Frankfurt Edge, as well as inbound voice calls to France numbers. Both services are in active monitoring as we evaluate performance. We will provide another update in 4 hours or as soon as more information becomes available.

11. monitoring Aug 18, 2026, 01:55 AM UTC

    Our engineers have implemented a fix and are monitoring system performance related to elevated errors impacting Interconnect in the Frankfurt Edge, as well as inbound voice calls to France numbers. Both services are in active monitoring as we evaluate performance. We will provide another update in 4 hours or as soon as more information becomes available.

12. resolved Aug 18, 2026, 05:20 AM UTC

    The issue related to elevated errors impacting Interconnect in the Frankfurt Edge, as well as inbound voice calls to France numbers, has been resolved and both services are operating normally at this time.

Read the full incident report →

Started Aug 16, 2026, 07:12 PM UTC· resolved Aug 17, 2026, 08:31 AM UTC

1. investigating Aug 16, 2026, 07:12 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Liberty Mobile network subscribers in Puerto Rico. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 16, 2026, 08:12 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Liberty Mobile network subscribers in Puerto Rico. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. investigating Aug 16, 2026, 10:12 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Liberty Mobile network subscribers in Puerto Rico. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

4. investigating Aug 17, 2026, 02:13 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Liberty Mobile network subscribers in Puerto Rico. Our team is actively investigating this issue. We will provide another update in 8 hours or as soon as more information becomes available.

5. monitoring Aug 17, 2026, 06:22 AM UTC

   We have observed a recovery in SMS delivery from Twilio to Liberty Mobile network subscribers in Puerto Rico and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

6. resolved Aug 17, 2026, 08:31 AM UTC

   The incident has been resolved and SMS delivery from Twilio to Liberty Mobile network subscribers in Puerto Rico is operating normally.

Read the full incident report →

Started Aug 16, 2026, 05:00 AM UTC· resolved Aug 16, 2026, 05:00 AM UTC

1. resolved Aug 20, 2026, 04:10 PM UTC

   Elastic SIP Trunking link was not available in Console sidebar for 10% of active users and users who signed up between 8/16/2026 and 8/19/2026. During this period of time customers may have noticed a link missing from the Console for Elastic SIP Trunking. The issue has now been resolved.

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Started Aug 15, 2026, 02:16 PM UTC· resolved Aug 17, 2026, 01:30 PM UTC

1. monitoring Aug 15, 2026, 02:16 PM UTC

   Beginning Aug 14 2026, ~21:45 UTC, we have observed an increase of 10-15% in blocks from Microsoft 365 impacting all Twilio Sendgrid IPs. We have confirmed with other industry contacts that they are observing similar behavior. The blocks are being observed at many domains hosted by Microsoft 365 and are not confined to a specific subset of recipient domains. Some users continue to see elevated blocks at Microsoft 365 domains. Microsoft has still not disclosed any outage with the service. The blocks are variation of the following: 550 5.7.511 Access denied, banned sender[x.x.x.x]. To request removal from this list please forward this message to [email protected]. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653. AS(1410) Users that are still experiencing these rejections should submit a delisting request per the instructions provided in the bounce message by sending an email with a copy of the error message, and the blocked IP address, to "[email protected]". Delisting requests can also be made via the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/ Additionally, we have observed an increase in blocks at Microsoft Outlook Consumer ("OLC") domains (e.g. 'hotmail.com', 'outlook.com'), which is a separate service from Microsoft 365, with syntax similar to the following: 550 5.7.1 Unfortunately, messages from [x.x.x.x] weren't sent. Please contact your Internet service provider since part of their network is on our block list (S3140). You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. Users experiencing these blocks should submit a delisting request to Microsoft here: https://olcsupport.office.com/ We have reached out to Microsoft to request an update on the status and we are still awaiting for a response. Until that time, we advise users to continue to escalate directly to Microsoft and request remediation.

2. resolved Aug 17, 2026, 01:30 PM UTC

   The incident is resolved as block rates at Microsoft 365 have returned to normal levels. Users that continue to see elevated blocks at Microsoft 365 can submit delisting requests to Microsoft by sending an email with a copy of the error message, and the blocked IP address, to "[email protected]". Delisting requests can also be made via the Office 365 Anti-Spam IP Delist Portal at https://sender.office.com/ Users that are experiencing blocks at Microsoft Outlook Consumer domains can open a remediation request at http://olcsupport.office.com/

Read the full incident report →

Started Aug 15, 2026, 12:55 PM UTC· resolved Aug 18, 2026, 01:45 PM UTC

1. investigating Aug 15, 2026, 12:55 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 15, 2026, 02:05 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. investigating Aug 15, 2026, 04:07 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

4. investigating Aug 15, 2026, 08:08 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team is actively investigating this issue. We will provide another update in 8 hours or as soon as more information becomes available.

5. identified Aug 15, 2026, 09:04 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

6. identified Aug 15, 2026, 10:04 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

7. identified Aug 16, 2026, 12:04 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

8. identified Aug 16, 2026, 04:10 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

9. identified Aug 16, 2026, 12:05 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel and Algar Telecom network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

10. identified Aug 16, 2026, 01:18 PM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel and Algar Telecom network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

11. identified Aug 16, 2026, 03:28 PM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel and Algar Telecom network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

12. identified Aug 16, 2026, 07:29 PM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel and Algar Telecom network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

13. identified Aug 17, 2026, 03:30 AM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel and Algar Telecom network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

14. identified Aug 17, 2026, 11:02 AM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

15. identified Aug 17, 2026, 12:07 PM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

16. identified Aug 17, 2026, 02:07 PM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

17. identified Aug 17, 2026, 05:31 PM UTC

    Twilio customers may be experiencing SMS delivery failures from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

18. identified Aug 17, 2026, 06:37 PM UTC

    Twilio customers may be experiencing SMS delivery failures from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

19. identified Aug 17, 2026, 08:43 PM UTC

    Twilio customers may be experiencing SMS delivery failures from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

20. identified Aug 18, 2026, 12:44 AM UTC

    Twilio customers may be experiencing SMS delivery failures from Twilio to Telemat Cel network subscribers in Brazil. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

21. monitoring Aug 18, 2026, 08:51 AM UTC

    We have observed a recovery in SMS delivery from Twilio to Telemat Cel network subscribers in Brazil and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

22. monitoring Aug 18, 2026, 11:01 AM UTC

    We have observed a recovery in SMS delivery from Twilio to Telemat Cel network subscribers in Brazil and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

23. resolved Aug 18, 2026, 01:45 PM UTC

    The incident has been resolved and SMS delivery from Twilio to Telemat Cel network subscribers in Brazil is operating normally.

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Started Aug 15, 2026, 12:35 PM UTC· resolved Aug 16, 2026, 08:07 AM UTC

1. identified Aug 15, 2026, 12:35 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Orange/Soci network subscribers in Madagascar. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 15, 2026, 01:40 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Orange/Soci network subscribers in Madagascar. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. identified Aug 15, 2026, 03:42 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Orange/Soci network subscribers in Madagascar. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

4. identified Aug 15, 2026, 07:52 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Orange/Soci network subscribers in Madagascar. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

5. identified Aug 16, 2026, 03:53 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Orange/Soci network subscribers in Madagascar. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

6. monitoring Aug 16, 2026, 06:05 AM UTC

   We have observed a recovery in SMS delivery from Twilio to Orange/Soci network subscribers in Madagascar and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

7. resolved Aug 16, 2026, 08:07 AM UTC

   The incident has been resolved and SMS delivery from Twilio to Orange/Soci network subscribers in Madagascar is operating normally.

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Started Aug 15, 2026, 10:34 AM UTC· resolved Aug 15, 2026, 09:01 PM UTC

1. identified Aug 15, 2026, 10:34 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to Malitel network subscribers in Mali. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. monitoring Aug 15, 2026, 11:36 AM UTC

   We have observed a recovery in SMS delivery from Twilio to Malitel network subscribers in Mali and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

3. monitoring Aug 15, 2026, 01:40 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Malitel network subscribers in Mali and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

4. monitoring Aug 15, 2026, 05:40 PM UTC

   We have observed a recovery in SMS delivery from Twilio to Malitel network subscribers in Mali and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.

5. resolved Aug 15, 2026, 09:01 PM UTC

   The incident has been resolved and SMS delivery from Twilio to Malitel network subscribers in Mali is operating normally.

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Started Aug 15, 2026, 06:58 AM UTC· resolved Aug 16, 2026, 01:18 AM UTC

1. investigating Aug 15, 2026, 06:58 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to KDDI Corporation network subscribers in Japan. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. identified Aug 15, 2026, 06:59 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to KDDI Corporation network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

3. identified Aug 15, 2026, 07:59 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to KDDI network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

4. identified Aug 15, 2026, 10:00 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to KDDI Corporation network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

5. identified Aug 15, 2026, 02:09 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to KDDI network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

6. identified Aug 15, 2026, 10:10 PM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to KDDI network subscribers in Japan. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

7. monitoring Aug 15, 2026, 10:50 PM UTC

   We have observed a recovery in SMS delivery from Twilio to KDDI network subscribers in Japan and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

8. monitoring Aug 16, 2026, 12:50 AM UTC

   We have observed a recovery in SMS delivery from Twilio to KDDI network subscribers in Japan and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

9. resolved Aug 16, 2026, 01:18 AM UTC

   The incident has been resolved and SMS delivery from Twilio to KDDI Corporation network subscribers in Japan is operating normally.

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Started Aug 15, 2026, 05:53 AM UTC· resolved Aug 15, 2026, 08:21 AM UTC

1. investigating Aug 15, 2026, 05:53 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to Megacom network subscribers in Kyrgyzstan. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 15, 2026, 06:59 AM UTC

   Twilio customers may be experiencing SMS delivery delays from Twilio to MEGACOM network subscribers in Kyrgyzstan. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. resolved Aug 15, 2026, 08:21 AM UTC

   The incident has been resolved and SMS delivery from Twilio to MEGACOM network subscribers in Kyrgyzstan is operating normally.

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Started Aug 15, 2026, 03:47 AM UTC· resolved Aug 16, 2026, 06:10 AM UTC

1. investigating Aug 15, 2026, 03:47 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to multiple networks in multiple countries. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

2. investigating Aug 15, 2026, 04:49 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to multiple networks in multiple countries. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.

3. investigating Aug 15, 2026, 06:50 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to network subscribers on multiple networks in multiple countries. Our team is actively investigating this issue. We will provide another update in 4 hours or as soon as more information becomes available.

4. identified Aug 15, 2026, 07:38 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to multiple networks in multiple countries. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 1 hour or as soon as more information becomes available.

5. identified Aug 15, 2026, 08:47 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to network subscribers on multiple networks in multiple countries. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hours or as soon as more information becomes available.

6. identified Aug 15, 2026, 10:53 AM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to network subscribers on multiple networks in Middle East & Africa. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available. Affected Networks : Megacom-Kyrgyzstan TDCA-Afghanistan Telecom Cook Islands-Cook Islands Blue Sky Communications-American Samoa Annatel-Israel

7. identified Aug 15, 2026, 02:56 PM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to network subscribers on multiple networks in Middle East & Africa. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available. Affected Networks : Megacom-Kyrgyzstan TDCA-Afghanistan Telecom Cook Islands-Cook Islands Blue Sky Communications-American Samoa Annatel-Israel

8. monitoring Aug 15, 2026, 09:39 PM UTC

   Twilio customers may be experiencing SMS delivery failures from Twilio to network subscribers on multiple networks in Middle East & Africa. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available. Affected Networks : Megacom-Kyrgyzstan TDCA-Afghanistan Telecom Cook Islands-Cook Islands Blue Sky Communications-American Samoa Annatel-Israel

9. monitoring Aug 15, 2026, 11:45 PM UTC

   We have observed a recovery in SMS delivery from Twilio to network subscribers on multiple networks in multiple countries in the Middle East & Africa and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

10. monitoring Aug 16, 2026, 03:50 AM UTC

    We have observed a recovery in SMS delivery from Twilio to network subscribers on multiple networks in multiple countries in the Middle East and Africa and are monitoring service stability. We will provide another update in 8 hours or as soon as more information becomes available.

11. resolved Aug 16, 2026, 06:10 AM UTC

    The incident has been resolved and SMS delivery from Twilio to affected networks in multiple countries across the Middle East and Africa is operating normally.

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Started Aug 15, 2026, 02:55 AM UTC· resolved Aug 15, 2026, 04:21 AM UTC

1. investigating Aug 15, 2026, 02:55 AM UTC

   We are investigating a service interruption with Interconnect in the Frankfurt edge. We expect to provide another update in 1 hour or as soon as more information becomes available.

2. monitoring Aug 15, 2026, 03:48 AM UTC

   Interconnect in the Frankfurt edge is now operating normally. We will continue to monitor for system stability. We'll provide another update in 30 minutes or as soon as more information becomes available.

3. resolved Aug 15, 2026, 04:21 AM UTC

   Elevated errors impacting Interconnect in the Frankfurt edge have been resolved and Interconnect is operating normally at this time.

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