Outage in Twilio
SMS Delivery Receipt Delays from a Subset of Twilio International Pre-Registered Sender IDs to Vinaphone Vietnam
Resolved MinorIncident Report
Summary AI Generated
Twilio experienced a 3.4-hour minor incident where SMS delivery receipts from a subset of International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam were delayed. While messages themselves continued to deliver successfully, receipt confirmations were not returned in a timely manner, affecting visibility into delivery status for APAC SMS traffic. Twilio identified the root cause, observed recovery, and confirmed full resolution with delivery receipts returning to normal operation.
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam. Our team is actively investigating this 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.
Components affected
Twilio SMS, APACTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 17 hours ago - at 08/22/2026 07:07AM
The incident has been resolved and SMS delivery receipts from a subset of Twilio International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam are operating normally.
MONITORING
about 19 hours ago - at 08/22/2026 05:06AM
We have observed a recovery in SMS delivery receipts from a subset of Twilio International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.
IDENTIFIED
about 20 hours ago - at 08/22/2026 04:46AM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam. 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.
IDENTIFIED
about 21 hours ago - at 08/22/2026 03:45AM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam. 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.
INVESTIGATING
about 21 hours ago - at 08/22/2026 03:43AM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio International Pre-Registered Sender IDs to Vinaphone network subscribers in Vietnam. Our team is actively investigating this 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.
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