Outage in Twilio
SMS Delivery Report Delays from a Subset of Alphanumeric Sender IDs to MobiFone Vietnam
Resolved MinorIncident Report
Summary AI Generated
Twilio experienced SMS delivery receipt delays for messages sent from alphanumeric sender IDs to MobiFone network subscribers in Vietnam, lasting 9.7 hours. While SMS messages were still being delivered successfully, customers experienced significant delays in receiving delivery confirmation reports. The team identified the root cause and monitored service recovery before fully resolving the issue.
Twilio customers may be experiencing SMS delivery report delays from a subset of alphanumeric Sender IDs to MobiFone network subscribers in Vietnam. Message delivery may succeed, but delivery receipts may be delayed. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
Components affected
Twilio SMS, APACNeed to monitor Twilio outages?
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Latest Updates ( sorted recent to last )
RESOLVED
about 18 hours ago - at 03/27/2026 07:44AM
We are no longer experiencing SMS delivery delays from a subset of alphanumeric Sender IDs to MobiFone network subscribers in Vietnam. This incident has been resolved.
MONITORING
about 20 hours ago - at 03/27/2026 05:40AM
We have observed a recovery in SMS delivery receipts from a subset of Twilio Alphanumeric Senders to MobiFone 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 03/27/2026 05:39AM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone 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 8 hours or as soon as more information becomes available.
IDENTIFIED
1 day ago - at 03/27/2026 01:39AM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone 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 4 hours or as soon as more information becomes available.
IDENTIFIED
1 day ago - at 03/26/2026 11:39PM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone 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
1 day ago - at 03/26/2026 10:29PM
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Senders to MobiFone 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
1 day ago - at 03/26/2026 10:03PM
Twilio customers may be experiencing SMS delivery report delays from a subset of alphanumeric Sender IDs to MobiFone network subscribers in Vietnam. Message delivery may succeed, but delivery receipts may be delayed. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
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