Twilio incident

SMS Delivery Delays from Twilio Phone Numbers to T-Mobile United States

Minor Resolved View vendor source →

Twilio experienced a minor incident on May 20, 2026 affecting SMS Long Code, North America and SMS Long Code, North America and 1 more component, lasting 1d 4h. The incident has been resolved; the full update timeline is below.

Started
May 20, 2026, 03:43 PM UTC
Resolved
May 21, 2026, 08:12 PM UTC
Duration
1d 4h
Detected by Pingoru
May 20, 2026, 03:43 PM UTC

Affected components

SMS Long Code, North AmericaSMS Long Code, North AmericaMMS Long Code, North AmericaMMS Long Code, North AmericaSMS Short Code, North AmericaSMS Toll-Free, North AmericaMMS Short Code, North AmericaMMS Toll-Free, North AmericaSMS Toll-Free, North AmericaMMS Toll-Free, North America

Update timeline

  1. investigating May 20, 2026, 03:43 PM UTC

    Twilio customers may be experiencing SMS delivery delays from Twilio Phone Numbers 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.

  2. identified May 20, 2026, 03:54 PM UTC

    Twilio customers may be experiencing SMS delivery delays 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.

  3. identified May 20, 2026, 04:55 PM UTC

    Twilio customers may be experiencing SMS delivery delays 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 2 hours or as soon as more information becomes available.

  4. monitoring May 20, 2026, 06:24 PM UTC

    We have observed a recovery in SMS and MMS delivery from Twilio Phone Numbers 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.

  5. identified May 20, 2026, 08:45 PM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, 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.

  6. identified May 20, 2026, 09:47 PM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 2 hour or as soon as more information becomes available.

  7. identified May 20, 2026, 11:49 PM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hour or as soon as more information becomes available.

  8. identified May 21, 2026, 03:59 AM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hour or as soon as more information becomes available.

  9. identified May 21, 2026, 12:01 PM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US with the exception of a subset of short codes, Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hour or as soon as more information becomes available.

  10. monitoring May 21, 2026, 06:03 PM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US , Our team has monitoring the cause, and is working to resolve the issue. We will provide another update in 2 hour or as soon as more information becomes available.

  11. resolved May 21, 2026, 08:12 PM UTC

    We have been able to confirm stability and recovery with the traffic sent to T-Mobile Network in the US , and we are resolve the issue.