Outage in Zipwhip

SMS Delivery Failures From a Subset of Twilio Short Codes to T-Mobile United States

Resolved Minor

September 25, 2026 - Started 1 day ago - Lasted about 2 hours
Official incident page

Incident Report

Summary AI Generated

A subset of Twilio Short Codes experienced SMS delivery failures to T-Mobile subscribers in the United States, impacting Zipwhip customers relying on that routing path. The issue was identified and a recovery was observed approximately 10 minutes after root cause identification. The incident lasted roughly 2.5 hours before being fully resolved and confirmed stable.

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Short Codes to T-Mobile 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 1 day ago - at 09/25/2026 08:35PM

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

MONITORING 1 day ago - at 09/25/2026 06:34PM

We have observed a recovery in SMS delivery from a subset of Twilio Short Codes to T-Mobile 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 09/25/2026 06:21PM

Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Short Codes to T-Mobile 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 09/25/2026 06:11PM

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