Twilio Outage History

Twilio experienced SMS delivery delays to Tigo network subscribers in Bolivia for 10.1 hours, affecting message delivery and delivery receipt timing. The team identified the root cause and worked on resolution while monitoring service recovery. The incident was fully resolved with SMS delivery returning to normal operations.

Twilio experienced SMS delivery delays and failures from a subset of long codes to U Mobile network subscribers in Malaysia for 13.3 hours. The issue affected Twilio customers trying to send SMS messages to recipients on the U Mobile network in Malaysia. The incident was resolved after the team identified the root cause and implemented a fix, with SMS delivery returning to normal operations.

Twilio experienced delays in RCS message delivery to AT&T devices for 6.7 hours, causing messages to fall back to SMS at higher rates for customers with fallback enabled. The issue affected RCS messaging specifically to AT&T recipients, while other carriers remained unaffected. The problem was resolved and RCS message delivery returned to normal operation.

Twilio customers experienced voice call audio quality degradation between a subset of Twilio US phone numbers and T-Mobile network subscribers in the United States for 53.1 hours. The issue affected Twilio's Voice service in North America, with multiple periods of apparent recovery followed by recurrence. The incident was ultimately resolved with voice calls returning to normal operation.

Twilio's Conversations Classic service experienced issues with delivery receipts functionality for 1.2 hours. The problem affected customers' ability to receive delivery confirmation for their messages through the Conversations platform. Engineers identified and resolved the issue, restoring normal delivery receipts functionality.

Twilio experienced SMS delivery delays to Panhandle Telecommunication Systems Inc. network subscribers in the United States, affecting all North American SMS services including long codes, short codes, and toll-free numbers. The incident lasted 5 minutes and was classified as minor, with Twilio's team actively investigating the issue.

Twilio experienced SMS delivery delays from a subset of Long Codes and Toll-Free Numbers to AT&T network subscribers in the United States for 12 hours. The issue affected SMS delivery report timing rather than actual message delivery, impacting North American SMS services using both Long Code and Toll-Free number types. Twilio identified the root cause and restored normal SMS delivery operations after monitoring service stability.

Twilio experienced SMS delivery receipt delays affecting customers sending messages to Axiata network subscribers in Bangladesh, Indonesia, and Cambodia for 3.3 hours. While SMS messages were still being delivered successfully, customers experienced delays in receiving delivery confirmation receipts. The issue was identified, monitored during recovery, and fully resolved with normal delivery receipt operations restored.

Twilio's Intelligent Alerts service experienced an outage that made the feature unavailable for some customers for approximately 2 hours. The engineering team investigated and resolved the issue, with service returning to normal operation. The incident was fully resolved with continued monitoring to ensure system stability.

Twilio experienced SMS delivery delays and failures from a subset of long codes to CAMTEL network subscribers in Cameroon for 10.8 hours. The issue affected SMS services in the Middle East & Africa region, preventing reliable message delivery to users on the CAMTEL network. The incident was resolved after multiple recovery attempts and monitoring periods, with SMS delivery returning to normal operations.