TeleSign incident
Quality degradation - United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670)
Resolved after 9 hours 45 minutes, affecting United States, on September 18, 2026.
Start Time: 05:12 PM PST - 08/17/26 End Time: 12:19 AM PST - 08/18/26 Quality Degradation previously reported for ATT Mobility (310/016;030;150;170;280;380;410;670) from United States (US) have been resolved. ATT Mobility end users should no longer experience delays receiving SMS messages as all services are back to functioning properly.
Affected components
Update timeline
- investigating Sep 18, 2026, 12:48 AM UTC
Issue: US Operator - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only Quality degradation Date: 08/17/26 Start Time: 5:12 PM PST End Time: Ongoing Summary: We currently experience quality degradation toward United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only. SMS messages towards these operator(s) may face delays or difficulties in delivery. Telesign is engaged with carrier partners for updates on resolution. We'd like to apologize for any inconvenience and appreciate your patience during this service interruption. If you have any questions, please contact [email protected].
- resolved Sep 18, 2026, 10:33 AM UTC
Start Time: 05:12 PM PST - 08/17/26 End Time: 12:19 AM PST - 08/18/26 Quality Degradation previously reported for ATT Mobility (310/016;030;150;170;280;380;410;670) from United States (US) have been resolved. ATT Mobility end users should no longer experience delays receiving SMS messages as all services are back to functioning properly.
Your product runs on more than TeleSign
Add the vendors you depend on and get one message when any of them reports trouble. Free for 3 vendors, no card.
Amazon Web Services