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minor✓ Resolved

SMS Delivery Report Delays from a Subset of Alphanumeric Sender IDs to MobiFone Vietnam

Twilio•Thu, Mar 26, 2026, 10:03 PM
Status
resolved
Duration
9h 41m
Updates
6
Coverage
0 articles

INCIDENT TIMELINE

✓ ResolvedFri, Mar 27, 2026, 07:45 AM
This incident has been resolved.
monitoringFri, Mar 27, 2026, 05:40 AM
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.
identifiedFri, Mar 27, 2026, 05:39 AM
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.
identifiedFri, Mar 27, 2026, 01:39 AM
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.
identifiedThu, Mar 26, 2026, 11:39 PM
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.
identifiedThu, Mar 26, 2026, 10:29 PM
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.
investigatingThu, Mar 26, 2026, 10:03 PM
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.

📊 TECHNICAL DETAILS

Internal ID
a116ea45-5077-4718-bf40-0ab28f2e3d96
External ID
6yp3qryhhght
🕐 Started
Thu, Mar 26, 2026, 10:03 PM
🔄 Last Updated
Fri, Mar 27, 2026, 07:45 AM
✓ Resolved
Fri, Mar 27, 2026, 07:45 AM
MINOR
Impact Level
9h 41m
Total Duration
6
Status Updates
Affected Components
SMS, APAC
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