# Calls failing to start and concurrency stuck

- Provider: [Retell AI](https://down.guide/providers/retell)
- Confidence: Confirmed
- Impact: Partial outage
- lasted 6m
- started 2026-02-10 22:12 UTC
- Phone Call
- Retell AI states the impact was 2026-02-10 21:35 to 21:43 UTC (8m)
- id: DWN-4d4a34b63c
- Official page: https://stspg.io/0675g6hmvq57

## Updates from Retell AI
### 2026-02-10 22:12 UTC: identified
There were call initialization issues between 1:35pm and 1:43pm PST. Calls are back online now, but concurrency for some users may be stuck. We are working on a fix.

### 2026-02-10 22:18 UTC: resolved
Calls and concurrency should be back to normal.

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

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