Twilio Outage History

Twilio experienced Shaken/STIR verification failures for inbound calls originating from the AT&T network in the United States, affecting Voice services in North America. The issue lasted 5 hours before being fully resolved. Customers experienced call authentication problems during this period, with recovery beginning approximately 30 minutes before full resolution.

Twilio customers experienced SMS delivery receipt delays from a subset of Twilio Short Codes to Liberty Mobile subscribers in Puerto Rico and multiple US networks, though message delivery itself continued to succeed. The issue affected SMS services across North America and Latin America for 2.7 hours. Twilio identified the root cause and restored normal delivery receipt functionality.

Twilio's monitoring systems detected a potential issue with Console Login functionality that triggered an automated alert. Engineers investigated the issue over a 2-hour period and determined there was no noticeable customer impact. All systems were confirmed to be operational and the incident was resolved.

Twilio experienced SMS delivery delays and failures from a subset of Long Codes to T-Mobile Netherlands subscribers for 44.4 hours. The issue affected SMS services in Europe, with Twilio identifying the root cause and implementing a fix. Service recovery was observed and monitored before full resolution was confirmed.

Twilio experienced SMS delivery delays for 12.5 hours affecting messages sent from a subset of short codes to Telcel network subscribers in Mexico. The issue impacted Twilio's SMS service in the Latin America region, causing delayed message delivery to users on the Telcel mobile network. The incident was resolved and SMS delivery returned to normal operations.

Twilio experienced SMS delivery delays and failures to Jazz network subscribers in Pakistan for 2.8 hours. The issue affected Twilio's SMS service in the APAC region, preventing customers from successfully sending messages to Jazz mobile users. The service was restored to normal operation after the team observed recovery and monitored for stability.

Twilio experienced MMS delivery delays from a subset of short codes to Verizon and T-Mobile network subscribers in the United States for 3.2 hours. The issue affected MMS Short Code services in North America, causing delayed message delivery to customers on these major carrier networks. Twilio's team identified the root cause and implemented a fix, with service returning to normal operation after a monitoring period.

Twilio's Unified Profiles service experienced a degradation that prevented users from creating and configuring Unified Profiles Connections for 1.5 hours. Engineers identified the root cause and deployed a fix to restore normal functionality. The service was fully resolved and operating normally by the end of the incident.

Twilio experienced voice call failures from Twilio phone numbers to Vivo network subscribers in Brazil for 57.3 hours. The incident affected Twilio's Voice service in the Latin America region, preventing customers from successfully completing calls to users on Brazil's Vivo network. The issue was identified and resolved, with service returning to normal operation after a monitoring period to ensure stability.

Twilio's monitoring systems detected a potential issue with email events, prompting an investigation by their engineering team. After a 4-minute investigation, engineers determined there was no actual customer impact and all systems remained operational. The incident was resolved as a false alarm triggered by automated monitoring.