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SMS Delivery Failures from a Subset of Twilio Alphanumeric Sender IDs to Altan Redes Mexico

Minor Impact Resolved Duration: 4h 21m August 21, 2026

Incident Lifecycle

Investigating Investigating Identified Monitoring
Affected Components
SMS, Latin America

Incident Timeline

Monitoring
We have observed a recovery in SMS delivery from a subset of Twilio Alphanumeric Sender IDs to Altan Redes 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.
Aug 21, 2026 at 6:57 AM UTC
Identified
Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Alphanumeric Sender IDs to Altan Redes 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.
Aug 21, 2026 at 5:52 AM UTC
Investigating
Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Alphanumeric Sender IDs to Altan Redes network subscribers in Mexico. Our team is actively investigating this issue. We will provide another update in 2 hours or as soon as more information becomes available.
Aug 21, 2026 at 4:08 AM UTC
Investigating
Twilio customers may be experiencing SMS delivery failures from a subset of Twilio Alphanumeric Sender IDs to Altan Redes network subscribers in Mexico. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.
Aug 21, 2026 at 3:08 AM UTC
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