Outage in Twilio
SMS Delivery Receipt Delays From a Subset of Twilio Long Codes and Toll-Free Numbers to Viaero United States
Resolved MinorIncident Report
Summary AI Generated
Twilio experienced SMS delivery delays for 18.9 hours when sending messages from a subset of long codes and toll-free numbers to Viaero network subscribers in the United States. While messages could still be delivered successfully, customers experienced significant delays in receiving delivery receipts. The issue was identified and resolved, with SMS delivery to Viaero returning to normal operation.
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.
Components affected
Twilio SMS Toll-Free, North AmericaTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
about 16 hours ago - at 05/22/2026 05:50PM
We are no longer experiencing SMS delivery delays when sending messages to Viaero. This incident has been resolved.
MONITORING
about 18 hours ago - at 05/22/2026 03:50PM
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.
IDENTIFIED
about 20 hours ago - at 05/22/2026 01:54PM
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.
IDENTIFIED
1 day ago - at 05/22/2026 05:49AM
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.
IDENTIFIED
1 day ago - at 05/22/2026 01:51AM
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.
IDENTIFIED
1 day ago - at 05/21/2026 11:55PM
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.
INVESTIGATING
1 day ago - at 05/21/2026 10:59PM
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.
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