Twilio Outage History

Twilio reported SMS delivery delays affecting messages sent to Claro Network in Brazil and Mascom in Botswana. Users sending SMS to these networks may have experienced delays or undelivered messages while Twilio worked with the carrier partners to restore service. The issue impacted two carrier networks across Latin America and Africa.

Twilio conducted a coordinated maintenance window across United States carrier networks (AT&T) and Canada partner networks beginning at Apr 4, 2025 3:02 AM UTC. The maintenance affected 11 carrier-network components involved in SMS and MMS routing and related identity checks, including Verify Silent Network Auth, Lookup SIM Swap, Lookup Identity Match, and multiple North America path components for SMS and MMS, as well as Zipwhip Messaging services. The activity spanned US and Canada carriers and could have caused intermittent delays or interruptions in sending and receiving SMS/MMS during the window. The maintenance lasted from Apr 4, 2025 3:02 AM UTC to Apr 4, 2025 11:07 AM UTC, approximately 8 hours and 5 minutes. Twilio issued 6 official status updates during the incident, with the final update indicating all affected components had returned to normal by Apr 4, 2025 11:07 AM UTC. The scope was North America, involving 11 components across Carrier Network and Zipwhip Messaging.

The incident began with a latency spike in Twilio Flex, resulting in a small number of errors during task and meeting orchestration. During the same window, messaging and voice paths experienced regional impacts, including SMS delivery delays to O2 in the Czech Republic and call failures from US and Canadian networks toward a subset of Twilio Toll-Free numbers. These issues affected multiple components, including FLEX / Flex Application Platform, CARRIER NETWORK / SMS, Europe, PROGRAMMABLE VOICE / PSTN, and CARRIER NETWORK / Voice, North America.

The Twilio platform experienced widespread SMS delivery failures and delays across carrier networks and messaging endpoints in Europe, North America, and Latin America. The disruption began on Apr 2, 2025 12:27 PM UTC with SMS delivery failures to the H3G network in Sweden and expanded to affect additional networks and regions, including Claro in Brazil and Tre in Sweden, as well as delivery delays on U.S. networks. Users reported messages not delivering or arriving late, impacting business communications and other SMS-based workflows. The incident touched multiple components, including carrier networks and messaging routes. The incident lasted approximately 28 hours, with most affected components returning to normal by Apr 3, 2025 4:47 PM UTC.

Twilio faced a global disruption impacting SMS, MMS, and voice services carried by multiple carrier partners. The issue began with carrier partner maintenance on 3:02 AM UTC and evolved into a sustained incident that affected numerous networks across North America, Europe, APAC, and other regions. Users experienced delayed and failing SMS and MMS deliveries, as well as intermittent Programmable Voice and related services. The incident spanned about 6 days, continuing through 4:07 AM UTC with Twilio issuing a series of status updates as engineers worked with various carriers to restore service. The disruption involved a broad set of components, including CARRIER NETWORK, PROGRAMMABLE VOICE, FLEX, and related developer tools across multiple regions.

The outage affected a subset of toll-free US numbers, with some voice calls failing or experiencing degraded quality for affected numbers. At the same time, a subset of Twilio customers reported errors when deploying the Twilio CLI. The incident began on 6:22 PM UTC and was resolved by 2:22 AM UTC, lasting roughly 8 hours.

Twilio issued six status updates during the incident to communicate progress. Updates ranged from initial investigation to identified root cause and ongoing maintenance. The disruption involved multiple components and carrier interactions, including CARRIER NETWORK / SMS, Europe; TWILIO PLATFORM / Other; and CARRIER NETWORK functions such as Lookup Identity Match and Lookup SIM Swap. A UK carrier partner maintenance event for Vodafone was listed as in progress during the period before services returned to normal.

Twilio experienced an extended outage affecting SMS and MMS delivery across multiple carriers and regions, along with Twilio Console login issues and MFA configuration problems. The incident began with scheduled carrier maintenance on 5:02 AM UTC that moved several Carrier Network and Messaging components into maintenance. Over the next two days, Twilio posted a series of maintenance and warning updates as engineers worked to restore service across North America, Europe, Latin America, and APAC. By Mar 26, 2025 4:32 PM UTC the affected components returned to a healthy state, marking the end of the incident.

Impact included SMS delivery delays and occasional failures to multiple networks (for example Claro in Brazil), delays in receiving messages, and issues logging into the Twilio Console (including 503 errors). There were also MFA-related configuration glitches for non-US customers and a UI display issue with Studio Flows. Twilio's teams provided ongoing updates and worked to restore full functionality, with recovery confirmed at Mar 26, 2025 4:32 PM UTC after about 2 days and 11 hours of disruption.

Twilio ran a scheduled United States Account Security Carrier Partner Maintenance with T-Mobile US. During the window, two CARRIER NETWORK components—Verify Silent Network Auth and Lookup SIM Swap—were placed under maintenance, which could impact carrier-based authentication and SIM-swap verification for users in the United States.

The maintenance window began at Mar 23, 2025 5:02 AM UTC and ended at Mar 23, 2025 12:02 PM UTC (approximately 7 hours). The Twilio status page issued 2 updates during the incident and confirmed restoration to normal operation at Mar 23, 2025 12:02 PM UTC.

Twilio reported SMS delivery delays and failures to the Telefonica network in Mexico, impacting outbound messages to Mexico. At the same time, a scheduled maintenance window affected ZIPWHIP MESSAGING in North America, including SMS Long Code, MMS Long Code, SMS Toll-Free, and MMS Toll-Free, which could have caused delays or interruptions. The Latin America issue began at 8:52 PM UTC and the North America maintenance started around 9:00 PM UTC. The incident affected 5 components across two regions (CARRIER NETWORK / SMS, Latin America; ZIPWHIP MESSAGING / SMS Long Code, MMS Long Code, SMS Toll-Free, MMS Toll-Free, North America). The provider issued 3 status updates during the incident. Affected components returned to normal by Mar 23, 2025 1:02 AM UTC.

The Twilio platform experienced a broad disruption affecting SMS delivery, MMS delivery, and voice-related messaging across multiple carrier networks worldwide. The issue began with SMS delivery delays to Vodafone in Romania and escalated to additional carrier partners and regions, impacting messaging and inbound/outbound call flows for customers. The incident began on Mar 18, 2025 9:32 PM UTC and persisted for approximately 65 hours.