# SMS Delivery 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 4h 36m
- started 2026-05-21 17:35 UTC
- SMS Long Code, North America, SMS Toll-Free, North America, SMS Toll-Free, North America
- us
- id: DWN-f710ca9c28
- Official page: https://stspg.io/34kd0gwc1xpg

## Updates from Twilio
### 2026-05-21 17:35 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 is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

### 2026-05-21 17:54 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. We will provide another update in 1 hour or as soon as more information becomes available.

### 2026-05-21 19:00 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. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-05-21 20:10 UTC: monitoring
We have observed a recovery in SMS delivery from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-05-21 22:12 UTC: resolved
The incident has been resolved and SMS delivery from a subset of Twilio Long Codes and Toll-Free Numbers to Viaero network subscribers in the United States is operating normally.

From the builder: does your app depend on Twilio? [Sazabi](https://www.sazabi.com/?utm_source=down-guide&utm_medium=markdown&utm_content=twilio) detects problems in your own logs without hand-written monitors, and you can ask it in plain language which errors mention Twilio.

---
down.guide reads providers' official status pages every minute and adds its own evidence, always labeled. Free, no account. Agents: MCP at https://down.guide/mcp, REST at https://down.guide/api/v1, feeds at https://down.guide/feed. Built by [Sazabi](https://www.sazabi.com/?utm_source=down-guide&utm_medium=markdown&utm_content=DWN-f710ca9c28), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.