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

        Incident Report for Twilio

        Resolved

        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.
        Posted Jul 19, 2026 - 17:26 PDT

        Monitoring

        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.
        Posted Jul 19, 2026 - 17:24 PDT

        Update

        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.
        Posted Jul 19, 2026 - 14:29 PDT

        Update

        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.
        Posted Jul 18, 2026 - 14:24 PDT

        Update

        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.
        Posted Jul 17, 2026 - 22:18 PDT

        Update

        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.
        Posted Jul 17, 2026 - 14:17 PDT

        Update

        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.
        Posted Jul 17, 2026 - 10:12 PDT

        Update

        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.
        Posted Jul 17, 2026 - 08:10 PDT

        Identified

        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.
        Posted Jul 17, 2026 - 07:10 PDT
        This incident affected: CARRIER NETWORK (SMS, APAC).