SMS Delivery Receipt Delays From a Subset of Twilio Long Codes and Toll-Free Numbers to Viaero United States
Incident Lifecycle
Incident Timeline
Monitoring
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.
May 22, 2026 at 3:50 PM UTC
Identified
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.
May 22, 2026 at 1:54 PM UTC
Identified
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.
May 22, 2026 at 5:49 AM UTC
Identified
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.
May 22, 2026 at 1:51 AM UTC
Identified
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.
May 21, 2026 at 11:55 PM UTC
Investigating
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.
May 21, 2026 at 10:59 PM UTC
Was your business affected by this Twilio outage?
Set up instant alerts for Twilio, be the first to know about outages via email, Slack, Teams, or Discord.