Twilio incident: Voice Call Failures from a Subset of Twilio Phone Numbers to T-Mobile United States

Affected components

• Voice, North America

1. monitoringOct 29, 2026, 05:54 UTC

   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to 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.

2. identifiedOct 29, 2026, 04:01 UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to 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.

3. identifiedOct 29, 2026, 02:58 UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to T-Mobile 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.

4. monitoringOct 29, 2026, 01:45 UTC

   We have observed a recovery in voice calls from a subset of Twilio Phone Numbers to T-Mobile 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.

5. identifiedOct 29, 2026, 01:43 UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to T-Mobile 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.

6. investigatingOct 29, 2026, 01:34 UTC

   Twilio customers may be experiencing voice call failures from a subset of Twilio Phone Numbers to 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.

What APIStatus.watch saw

• Oct 29, 2026, 01:35 UTCoperational → unknown
• Oct 29, 2026, 01:40 UTCunknown → operational
• Oct 29, 2026, 03:30 UTCoperational → unknown
• Oct 29, 2026, 03:35 UTCunknown → operational

Other services with incidents at the same time

Overlapping incidents aren't necessarily related.

• Mux: Elevated Mux Video ErrorsCritical · Oct 28, 2026, 23:42 UTC
• Akamai: Edge Delivery issues between Indonesia and SingaporeMinor · Oct 25, 2026, 13:44 UTC
• Linode: Connectivity Issue between ID-CGK (Jakarta) and SG-SIN-2 (Singapore 2)Minor · Oct 25, 2026, 13:54 UTC
• SendGrid: Voice Call Failures from Twilio Phone Numbers to RomaniaMinor · Oct 26, 2026, 13:09 UTC
• SendGrid: SMS Delivery Delays from a Subset of Twilio Short Codes to Docomo Pacific United StatesMinor · Oct 26, 2026, 20:57 UTC
• SendGrid: SMS Delivery Delays and Failures between a Subset of Twilio Brazil Phone Numbers and Multiple Networks in BrazilMinor · Oct 26, 2026, 23:55 UTC
• SendGrid: Voice Call Failures From Twilio Phone Numbers to GermanyMinor · Oct 27, 2026, 09:00 UTC
• Tailscale: Funnel hostnames not resolving in public DNSMinor · Oct 27, 2026, 14:16 UTC
• SendGrid: MMS Delivery Delays from a Subset of Twilio Long Codes to C-Spire United StatesMinor · Oct 27, 2026, 21:31 UTC
• GitBook: API operations are slower than usualMinor · Oct 28, 2026, 09:15 UTC

How often does Twilio have incidents?

Twilio reported 508 incidents in the last 90 days, 2 of them major or critical. A typical incident lasted 6h 7m. See Twilio's uptime and incident history