Twilio Outage History

Twilio experienced SMS delivery delays from Long Codes to Claro network subscribers in Colombia for 5.6 hours. The issue affected SMS services in Latin America, causing delayed message delivery to users on the Claro mobile network. The team identified the root cause and restored normal SMS delivery operations.

Twilio experienced SMS delivery delays from their phone numbers and short codes to T-Mobile network subscribers in the United States for 28.5 hours. The issue primarily affected SMS short code services in North America, with most regular phone number traffic recovering early but a subset of short codes continuing to experience problems. Twilio identified the root cause and confirmed full stability and recovery across all services to the T-Mobile network.

Twilio experienced SMS delivery delays from Twilio Phone Numbers to MTN network subscribers in Nigeria for 4.4 hours. The issue affected SMS services in the Middle East & Africa region, preventing timely message delivery to MTN customers. Twilio's team identified the root cause and resolved the incident, with SMS delivery returning to normal operations.

Twilio experienced SMS delivery failures from network subscribers to Denmark phone numbers, affecting customers using Twilio's SMS service in Europe for approximately 183 hours. The issue was identified and worked on for several days, with gradual recovery observed starting May 26th. Service was fully restored on May 27th with SMS delivery to Twilio Denmark phone numbers operating normally.

Twilio experienced SMS delivery delays from their phone numbers to Orange network subscribers in France for 6.1 hours. The issue affected SMS services in the Europe region, causing delayed message delivery to customers on the Orange France network. Twilio identified the root cause and resolved the incident, with SMS delivery returning to normal operations.

Twilio customers experienced SMS delivery delays when sending messages from Twilio phone numbers to GTA Wireless network subscribers in the United States for 48 hours. The issue affected all North American SMS services including long code, short code, and toll-free numbers. After multiple recovery attempts and monitoring periods, the incident was fully resolved and SMS delivery returned to normal operation.

Twilio experienced SMS delivery failures from a subset of short codes to New Zealand destinations for 3.2 hours. The issue affected SMS services in the APAC region, preventing messages from being delivered to New Zealand phone numbers. Twilio identified the root cause and restored normal SMS delivery functionality.

Twilio's Intelligent Alerts service experienced a complete delivery failure for 57 minutes, preventing customers from receiving any intelligent alerts. The issue was identified, resolved, and service was fully restored with normal alert delivery resuming.

Twilio experienced increased failures in User Authentication Identity Silent Network Auth (SNA) specifically for Smartfren network users in Indonesia, affecting the Verify Silent Network Auth service. The incident lasted 14.3 hours, during which customers using Smartfren as their mobile carrier encountered authentication failures when attempting to verify their identity through silent network authentication. Twilio's team identified the root cause and implemented a fix, with service recovery observed before full resolution was confirmed.

Twilio experienced a 6.1-hour incident where SMS delivery receipts from alphanumeric sender IDs to T-Mobile Czech Republic subscribers were significantly delayed, though message delivery itself continued to function normally. The issue affected Twilio's SMS service in Europe, specifically impacting delivery confirmation notifications that customers rely on to verify successful message transmission. Twilio identified the root cause and fully restored normal delivery receipt processing after monitoring the recovery for stability.