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Outage in Twilio

Voice Call Failures from Twilio Phone Numbers to Telcel/Radiomovil Mexico

Resolved Minor
March 23, 2026 - Started 2 days ago - Lasted 2 days
Official incident page

Incident Report

Summary AI Generated

Twilio experienced voice call failures from Twilio phone numbers to Telcel/Radiomovil network subscribers in Mexico, resulting in SIP 484 errors that affected outbound calling capabilities. The incident impacted Twilio's Voice service in North America for 46.6 hours while engineers worked with carrier partners to resolve the connectivity issue. Service was restored after engineers observed recovery in call completion rates and confirmed stable operations.

Our monitoring systems have detected a potential issue with outbound calls to Mexico, resulting in a SIP 484. Our engineers have been alerted and are investigating. We will provide an update when we have more details.
Components affected
Twilio Voice, North America

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Latest Updates ( sorted recent to last )
RESOLVED 30 minutes ago - at 03/25/2026 10:46PM

This incident has been resolved.

MONITORING about 4 hours ago - at 03/25/2026 07:00PM

We have observed a recovery in voice calls from Twilio Phone Numbers to Telcel network subscribers in Mexico and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

MONITORING about 7 hours ago - at 03/25/2026 04:41PM

We have observed a recovery in voice calls from Twilio Phone Numbers to Telcel network subscribers in Mexico and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

IDENTIFIED about 15 hours ago - at 03/25/2026 08:19AM

Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Telcel/Radiomovil network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 24 hours or as soon as more information becomes available.

IDENTIFIED 1 day ago - at 03/24/2026 04:33PM

Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Telcel/Radiomovil network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 16 hours or as soon as more information becomes available.

IDENTIFIED 1 day ago - at 03/24/2026 08:40AM

Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Telcel/Radiomovil network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 8 hours or as soon as more information becomes available.

IDENTIFIED 2 days ago - at 03/24/2026 04:46AM

Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Telcel/Radiomovil network subscribers in Mexico. Our team has identified the cause, and is working to resolve the issue. We will provide another update in 4 hours or as soon as more information becomes available.

IDENTIFIED 2 days ago - at 03/24/2026 02:27AM

Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to Telcel/Radiomovil network subscribers in Mexico. 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.

IDENTIFIED 2 days ago - at 03/24/2026 01:30AM

Twilio customers may be experiencing voice call failures from Twilio Phone Numbers to network subscribers in Mexico. 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.

INVESTIGATING 2 days ago - at 03/24/2026 12:50AM

We are observing call failures from a subset of Twilio phone numbers to multiple network subscribers in Mexico. We are currently working with our carrier partners to resolve the issue. We expect to provide another update in 1 hour or as soon as more information becomes available.

INVESTIGATING 2 days ago - at 03/24/2026 12:12AM

Our monitoring systems have detected a potential issue with outbound calls to Mexico, resulting in a SIP 484. Our engineers have been alerted and are investigating. We will provide an update when we have more details.

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