Twilio Outage History

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.

Twilio's One Console Voice SIP Domain regional pages experienced issues preventing customers from accessing SIP Domain details for resources created in the au1 and ie1 regions, with error messages blocking the display of domain information. The incident lasted 49 minutes before engineers resolved the problem and restored normal functionality to the affected regional pages.

Twilio experienced voice call failures from a subset of their phone numbers to network subscribers in Greece, affecting their Voice service in the Europe region. The incident lasted 7.1 hours before service recovery was observed and normal operations were restored. Twilio monitored service stability after the initial recovery before confirming full resolution.

Twilio experienced SMS delivery delays to multiple networks across European countries for approximately 6 days, affecting customers sending messages to European network subscribers. The team identified the root cause and implemented a fix, with the service returning to normal operation after an extended monitoring period to ensure stability.

Twilio experienced SMS delivery delays and failures from a subset of short codes to Algar Telecom network subscribers in Brazil for 11.4 hours. The issue affected Twilio customers' ability to send SMS messages to recipients on the Algar Telecom network in Brazil. The team identified the root cause and service recovery was observed, with monitoring continuing to ensure stability.

Twilio experienced SMS delivery delays and failures between Twilio phone numbers and Hi3G network subscribers in Denmark for 6.9 hours. The issue affected SMS services in the Europe region, preventing or delaying message delivery to users on the Hi3G network. Twilio identified the root cause and restored normal SMS delivery operations between their service and Hi3G subscribers.

Twilio experienced delays in outbound WhatsApp messages through their Conversations service for 40 minutes. The incident affected message delivery times, causing a spike in delays for users sending WhatsApp messages. The service was restored after monitoring showed recovery, and normal message delivery resumed.

Twilio experienced SMS delivery delays from all Twilio phone numbers (long code, short code, and toll-free) to GTA Wireless network subscribers in the United States for 9.8 hours. The incident affected SMS services across North America and impacted multiple SMS components including long codes, short codes, and toll-free numbers. The issue was identified and resolved, with SMS delivery returning to normal operations.

Twilio experienced MMS delivery delays from Short Codes to AT&T network subscribers in the United States for 5.5 hours. The issue affected MMS Short Code services in North America, causing delayed message delivery to AT&T customers. Twilio identified the root cause and restored normal MMS delivery operations.

Twilio experienced SMS delivery failures and delays between Twilio phone numbers and multiple mobile networks in Brazil for 3.1 hours. The incident affected SMS services across Latin America, preventing or delaying message delivery to network subscribers in Brazil. The issue was identified and resolved, with SMS delivery returning to normal operations.