TeleSign incident

Quality degradation - United States (US) - ATT Mobility (310/016;030;150;170;280;380;410;670)

Minor Resolved View vendor source →

TeleSign experienced a minor incident on September 18, 2026 affecting United States, lasting 9h 45m. The incident has been resolved; the full update timeline is below.

Started
Sep 18, 2026, 12:48 AM UTC
Resolved
Sep 18, 2026, 10:33 AM UTC
Duration
9h 45m
Detected by Pingoru
Sep 18, 2026, 12:48 AM UTC

Affected components

United States

Update timeline

  1. 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].

  2. 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.