Outage in Zipwhip

SMS Delivery Failures from a Subset of Twilio Long Codes to AT&T United States

Resolved Minor

September 09, 2026 - Started 1 day ago - Lasted about 4 hours
Official incident page

Incident Report

Summary AI Generated

SMS delivery failures occurred on Zipwhip affecting a subset of Twilio Long Codes sending to AT&T network subscribers in the United States. The incident lasted approximately 3.9 hours before Twilio identified the cause and implemented a fix. Service was fully restored and confirmed resolved after a monitoring period.

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Short Codes and Long Codes to AT&T network subscribers 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.

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Latest Updates ( sorted recent to last )

RESOLVED about 22 hours ago - at 09/09/2026 10:50PM

The incident has been resolved and SMS delivery from a subset of Twilio Long Codes to AT&T network subscribers in the United States is operating normally.

MONITORING about 23 hours ago - at 09/09/2026 10:20PM

We have observed a recovery in SMS delivery from a subset of Twilio Long Codes to AT&T network subscribers in the United States and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

MONITORING 1 day ago - at 09/09/2026 08:19PM

We have observed a recovery in SMS delivery from a subset of Twilio Long Codes to AT&T network subscribers 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.

IDENTIFIED 1 day ago - at 09/09/2026 07:22PM

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Long Codes to AT&T network subscribers 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.

INVESTIGATING 1 day ago - at 09/09/2026 06:58PM

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