Twilio incident

SMS Delivery Delays and Failures from a Subset of Twilio Long Codes to U Mobile Malaysia

Minor Resolved View vendor source →

Twilio experienced a minor incident on May 11, 2026 affecting SMS, APAC, lasting 13h 13m. The incident has been resolved; the full update timeline is below.

Started
May 11, 2026, 05:22 PM UTC
Resolved
May 12, 2026, 06:36 AM UTC
Duration
13h 13m
Detected by Pingoru
May 11, 2026, 05:22 PM UTC

Affected components

SMS, APAC

Update timeline

  1. investigating May 11, 2026, 05:22 PM UTC

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia. 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 11, 2026, 05:30 PM UTC

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia. 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 11, 2026, 06:30 PM UTC

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia. 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. identified May 11, 2026, 08:30 PM UTC

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

  5. identified May 12, 2026, 12:31 AM UTC

    Twilio customers may be experiencing SMS delivery delays and failures from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

  6. monitoring May 12, 2026, 03:18 AM UTC

    We have observed a recovery in SMS delivery from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

  7. monitoring May 12, 2026, 05:19 AM UTC

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

  8. resolved May 12, 2026, 06:36 AM UTC

    The incident has been resolved and SMS delivery from a subset of Twilio Long Codes to U Mobile network subscribers in Malaysia is operating normally.