TeleSign incident

Operator Service Alert - United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670) - 09/21/26

Minor Resolved View vendor source →

TeleSign experienced a minor incident on September 21, 2026 affecting United States, lasting 9h 34m. The incident has been resolved; the full update timeline is below.

Started
Sep 21, 2026, 09:02 PM UTC
Resolved
Sep 22, 2026, 06:36 AM UTC
Duration
9h 34m
Detected by Pingoru
Sep 21, 2026, 09:02 PM UTC

Affected components

United States

Update timeline

  1. investigating Sep 21, 2026, 09:02 PM UTC

    Issue: US Operator - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only Quality degradation Date: 09/21/26 Start Time:14:00 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]. SF 01238360

  2. investigating Sep 21, 2026, 10:20 PM UTC

    Issue: US Operator - ATT Mobility (310/016;030;150;170;280;380;410;670) -10 DLC only Quality degradation Date: 09/21/26 Start Time:14:00 PM PST End Time: 15:19 PM PST 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]. SF 01239806

  3. resolved Sep 22, 2026, 06:36 AM UTC

    Date: 09/22/26 Start Time: 14:00 PM PST End Time: 15:19 PM PST We received notification that the network issues previously reported by United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670) from United States (US) have been resolved. ATT Mobility (310/016;030;150;170;280;380;410;670) 10DLC end users should no longer experience delays receiving SMS messages as all services are back to functioning properly. On behalf of the Operator, we apologize for any inconvenience this issue may have caused. If you have additional questions, please feel free to contact [email protected]. SF 01239806