# SMS Delivery Receipt Delays from a Subset of Twilio Alphanumeric Numbers to T-Mobile Czech Republic

- Provider: [Twilio](https://down.guide/twilio)
- Level: confirmed
- Impact: Partial outage
- lasted 6h 6m
- started 2026-05-19 16:48 UTC
- SMS, Europe
- eu
- id: DWN-4adeea0548
- Official page: https://stspg.io/z50x01mjklzt

## Updates from Twilio
### 2026-05-19 16:48 UTC: investigating
Twilio customers may be experiencing SMS delivery receipt delays from Twilio to T-Mobile network subscribers in the Czech Republic. Our team is actively investigating this 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.

### 2026-05-19 16:51 UTC: investigating
We are continuing to investigate this issue.

### 2026-05-19 16:55 UTC: identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Sender IDs to T-Mobile network subscribers in the Czech Republic. 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.

### 2026-05-19 17:56 UTC: identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Numbers to T-Mobile network subscribers in the Czech Republic. 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.

### 2026-05-19 19:58 UTC: identified
Twilio customers may be experiencing SMS delivery receipt delays from a subset of Twilio Alphanumeric Sender IDs to T-Mobile network subscribers in the Czech Republic. 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.

### 2026-05-19 20:59 UTC: monitoring
We have observed a recovery in SMS delivery receipts from a subset of Twilio Alphanumeric Numbers to T-Mobile network subscribers in the Czech Republic and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

### 2026-05-19 22:54 UTC: resolved
The incident has been resolved and SMS delivery receipts from a subset of Twilio Alphanumeric Numbers to T-Mobile network subscribers in the Czech Republic are operating normally.

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