Twilio Outage History

Twilio experienced SMS delivery delays from a subset of short codes to Algar network subscribers in Brazil for 12.5 hours. The issue affected SMS services in the Latin America region, causing delayed message delivery to users on the Algar network. The incident was resolved after the team identified the root cause and implemented a fix, with service returning to normal operation.

Twilio's Flex AI Copilot experienced failures where approximately 30% of wrap-up notes generation requests were failing, preventing some users from creating notes using the AI Summarization feature within the Agent Copilot UI. The issue affected the Flex Agent Desktop service for 3.8 hours before engineers identified the root cause and deployed a fix. The AI Summarization feature and Agent Copilot UI returned to normal operation and continued to be monitored for stability.

Twilio's User Authentication Identity Silent Network Auth and Gateway API services experienced failures specifically for T-Mobile customers in the United States, lasting 9.4 hours. The incident affected Twilio's Verify Silent Network Auth component, preventing proper user authentication for T-Mobile subscribers. Twilio identified the root cause and restored normal service operations after monitoring the recovery.

Twilio virtual phone numbers became unusable for 1.7 hours, affecting the PHONE NUMBERS component. Engineers investigated the issue, deployed a fix, and monitored recovery before fully resolving the incident.

Twilio's User Authentication Identity API experienced high latency for 2.9 hours across multiple countries in North America and Latin America, including the USA, Brazil, and Colombia. The incident affected several lookup services including SIM Swap, Identity Match, and Line Type Intelligence APIs. The service was restored to normal operation after the team observed recovery and monitored for stability.

Twilio experienced SMS delivery delays to Claro network subscribers in Peru, affecting customers sending messages to that specific carrier. The incident impacted SMS services in the Latin America region and was classified as a minor issue. The service disruption lasted 12 minutes while the team investigated the delivery delays.

Twilio experienced voice call failures between a subset of Colombia phone numbers and multiple Colombian network subscribers, affecting Voice services in Latin America for 3.7 hours. The issue prevented customers from successfully completing calls to certain networks in Colombia. Twilio identified the root cause, implemented a fix, monitored service recovery, and confirmed normal operations were restored.

Twilio experienced SMS delivery delays to Pelephone and Ramy Levy network subscribers in Israel for approximately 20 hours. The incident affected Twilio customers sending SMS messages to these specific Israeli mobile networks in the Middle East & Africa region. The team identified the root cause and worked on a resolution, with service returning to normal operations after monitoring confirmed recovery.

Twilio experienced SMS delivery delays to T-Mobile network subscribers in the Czech Republic for 4.5 hours. The issue affected Twilio's SMS service in Europe, causing delayed message delivery to users on the T-Mobile Czech Republic network. The team identified the root cause and restored normal SMS delivery operations.

Twilio experienced SMS delivery delays to O2 network subscribers in the Czech Republic for 6.2 hours. The issue affected Twilio customers sending SMS messages to recipients on the O2 Czech Republic network, causing delayed message delivery. The team identified the root cause and resolved the incident, with SMS delivery returning to normal operations.