Twilio incident

SMS Delivery Receipt Delays from a Subset of Twilio Long Codes to Chunghwa Taiwan

Minor Resolved View vendor source →

Twilio experienced a minor incident on July 17, 2026 affecting SMS, APAC, lasting 2d 10h. The incident has been resolved; the full update timeline is below.

Started
Jul 17, 2026, 02:10 PM UTC
Resolved
Jul 20, 2026, 12:26 AM UTC
Duration
2d 10h
Detected by Pingoru
Jul 17, 2026, 02:10 PM UTC

Affected components

SMS, APAC

Update timeline

  1. identified Jul 17, 2026, 02:10 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

  2. identified Jul 17, 2026, 03:10 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.

  3. identified Jul 17, 2026, 05:12 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 4 hours or as soon as more information becomes available.

  4. identified Jul 17, 2026, 09:17 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 8 hours or as soon as more information becomes available.

  5. identified Jul 18, 2026, 05:18 AM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 16 hours or as soon as more information becomes available.

  6. identified Jul 18, 2026, 09:24 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  7. identified Jul 19, 2026, 09:29 PM UTC

    Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 24 hours or as soon as more information becomes available.

  8. monitoring Jul 20, 2026, 12:24 AM UTC

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

  9. resolved Jul 20, 2026, 12:26 AM UTC

    The incident has been resolved and SMS delivery receipts from a subset of Twilio Long Codes to Chunghwa network subscribers in Taiwan are operating normally.