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

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Degraded
- lasted 18h 51m
- started 2026-05-21 22:59 UTC
- SMS Toll-Free, North America
- us
- id: DWN-1eef6b064b
- Official page: https://stspg.io/bhn104qcrrd5

## Updates from Twilio
### 2026-05-21 22:59 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.

### 2026-05-21 23:55 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.

### 2026-05-22 01:51 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.

### 2026-05-22 05:49 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.

### 2026-05-22 13:54 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.

### 2026-05-22 15:50 UTC: 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.

### 2026-05-22 17:50 UTC: resolved
We are no longer experiencing SMS delivery delays when sending messages to Viaero. This incident has been resolved.

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