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minor✓ Resolved

SMS Delivery Receipt Delays From a Subset of Twilio Long Codes and Toll-Free Numbers to Viaero United States

TwilioThu, May 21, 2026, 10:59 PM
Status
resolved
Duration
18h 56m
Updates
6
Coverage
0 articles

INCIDENT TIMELINE

✓ ResolvedFri, May 22, 2026, 05:55 PM
This incident has been resolved.
monitoringFri, May 22, 2026, 03:50 PM
We are observing recovery in SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States. We will continue monitoring the service to ensure a full recovery. We will provide another update in 1 hour or as soon as more information becomes available.
identifiedFri, May 22, 2026, 01:54 PM
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States. 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.
identifiedFri, May 22, 2026, 05:49 AM
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States. 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, May 22, 2026, 01:51 AM
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States. 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, May 21, 2026, 11:55 PM
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States. 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.
investigatingThu, May 21, 2026, 10:59 PM
Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States. 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.

📊 TECHNICAL DETAILS

Internal ID
0cdcf423-1273-428d-8e3c-8769628ec01e
External ID
zzj7m05db81h
🕐 Started
Thu, May 21, 2026, 10:59 PM
🔄 Last Updated
Fri, May 22, 2026, 05:55 PM
✓ Resolved
Fri, May 22, 2026, 05:55 PM
MINOR
Impact Level
18h 56m
Total Duration
6
Status Updates
Affected Components
SMS Toll-Free, North America
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