Twilio Outage History

Twilio experienced SMS delivery delays starting at May 1, 2025 5:52 PM UTC for AT&T in the United States, with delays extending to additional routes including UK Voice, US MMS, MTN Nigeria, and Brazil. The issue affected messaging across North America, Europe, and Africa, causing messages to arrive late or fail on several carrier paths as engineers worked with partners to resolve the issue. The incident spanned multiple carrier networks and routes.

Twilio experienced a scheduled maintenance window affecting Canada and North American SMS channels during Bell Mobility involvement. The maintenance impacted five components across ZIPWHIP Messaging and Carrier Network services for long code, short code, and toll-free numbers. The window ran from May 1, 2025 11:02 AM UTC to May 1, 2025 1:32 PM UTC, lasting about 2 hours and 30 minutes. During this period, some users could have experienced delays or intermittent unavailability when sending or receiving SMS messages through these paths. The incident was a coordinated maintenance event, not a full service outage.

An extended incident began on Apr 17, 2025 8:12 PM UTC after Twilio reported elevated HTTP 500 errors impacting Flex Public APIs, marking a broad outage across multiple Twilio products and carrier networks. Users worldwide experienced SMS delivery delays and failures across many networks, with email delivery via Verify and Flex Messaging disrupted beginning later in the incident.

Twilio's status updates show a progression from investigation to partial recoveries and targeted maintenance. On Apr 23, 2025 9:42 PM UTC Twilio described Disruption to Emails Sent via Verify and Flex Messaging, followed by updates noting mitigation and a return to normal email traffic by Apr 24, 2025 12:02 AM UTC. Separately, SMS and MMS delivery delays persisted across numerous carrier networks in APAC, Europe, the Americas, and Africa, with ongoing carrier maintenance events and follow-up updates through Apr 25, 2025 1:02 AM UTC.

Overall, the outage was global in reach, affecting a broad set of components across messaging and communications services. The incident involved multiple official updates and a sustained communication cadence as Twilio worked with carrier partners to restore service. The incident is assessed as major given the breadth of impact over several days and across regions.

Twilio experienced a broad, ongoing incident affecting SMS delivery and related messaging services across a wide set of carriers and regions. Starting Apr 8, 2025 8:02 PM UTC, the issue involved delivery delays and outages spanning North America, Europe, the Middle East & Africa, APAC, and Latin America. The status page described maintenance events and delivery delays across multiple carrier networks and Twilio components, including SMS Long Code, Short Code, MMS, and the Content API.

Twilio conducted scheduled maintenance for Multiple Destination Voice Carrier Partner Maintenance, briefly affecting the Voice carrier network in Latin America and Europe. The maintenance began on 5:07 PM UTC and completed on 5:12 PM UTC, lasting about 5 minutes. The affected components were CARRIER NETWORK / Voice, Latin America and CARRIER NETWORK / Voice, Europe. Twilio issued 2 status updates during the window, and the service returned to normal after the maintenance.

Twilio experienced ongoing delays in SMS delivery and intermittent voice issues as multiple carrier networks underwent scheduled maintenance. Updates cited maintenance on carrier networks including T-Mobile and Verizon Wireless in North America, TIM in Brazil, Singapore Voice, and other regional partners, affecting SMS short code, long code, toll-free numbers, and voice paths across the Americas, APAC, Europe, and beyond. The status page shows a sequence of in-progress maintenance, warnings, and gradual recoveries throughout the day, with some routes returning to normal as carriers completed work. The incident began at Apr 8, 2025 2:02 AM UTC and progressed through the afternoon, with updates continuing until Apr 8, 2025 5:02 PM UTC and beyond.

Twilio reported degraded SMS delivery across multiple regions, with delays and some failures affecting Africell in DR Congo and Dish Network in the United States via a subset of longcodes. The issue involved several carrier networks and platform components spanning Africa, North America, and APAC, and on-call engineers worked with carrier partners to diagnose and resolve the root cause. The incident impacted Carrier Network / SMS and related services across multiple regions, with ongoing communication through status updates as the situation evolved.

Twilio experienced delays and delivery failures for SMS to Dish Network recipients in the United States via Long Code, affecting multiple North American messaging channels including Long Code, Short Code, Toll-Free, and ZIPWHIP MESSAGING. Users sending messages to Dish Network numbers could have seen delays or non-delivery. The incident began at Apr 7, 2025 5:02 AM UTC and lasted about 5 hours and 5 minutes, with a maintenance window starting at 6:52 AM UTC.

Twilio reported MMS/SMS delivery delays for messages sent to the MTN Nigeria network, affecting users attempting to reach MTN Nigeria. Engineers were actively coordinating with the MTN Nigeria carrier partner to resolve the issue. The incident began on Apr 6, 2025 11:32 AM UTC and prompted updates indicating ongoing investigation and efforts to restore normal delivery, with service restoration by Apr 6, 2025 4:17 PM UTC. The problem was localized to the MTN Nigeria carrier path within Twilio's Middle East & Africa SMS channel, and two official status updates were issued during the incident.

The outage lasted roughly 4 hours and 45 minutes, during which SMS delivery to MTN Nigeria experienced degraded performance. Normal messaging resumed after the carrier issues were addressed, as communications on the status page indicated.

Twilio reported scheduled maintenance with Vodafone's UK carrier partner affecting two carrier-network components used for identity matching and lookup: Lookup Identity Match and Legacy Identity Match/Attributes. The window ran from Apr 5, 2025 9:57 PM UTC to Apr 6, 2025 4:17 AM UTC, lasting about 6 hours and 20 minutes. During this period, these components were listed as undergoing maintenance, and users in the United Kingdom may have experienced degraded performance or intermittent issues with identity-related services.