# Vonage API: USA SMS - Delivery degradation affecting TFN traffic towards AT&T operator

- Provider: [Vonage API](https://outages.cc/vonage.md)
- Type: Incident
- State: Resolved
- Worst impact: Degraded performance
- Started: 2026-10-20 17:57 UTC
- Resolved: 2026-10-21 00:33 UTC (lasted 6 h 36 min)
- Components: SMS North America, Global Connectivity - SMS North America
- Official update: https://stspg.io/krcxd7fnclmz

## Updates from Vonage API

### resolved, 2026-10-21 00:33 UTC

This incident has been resolved.

### monitoring, 2026-10-20 18:28 UTC

A fix has been implemented and we are monitoring the results.

### investigating, 2026-10-20 17:57 UTC

Please be advised that we are observing SMS delivery degradation for TFN towards AT&T operator in USA.. We are working towards resolution of the issue and will issue an update as soon as more information becomes available. If you have any questions, please contact api.support.vonage.com