Twilio Outage History

Twilio experienced SMS delivery delays affecting several carrier networks across APAC and Europe, including Laos ETL Network, Vodafone in Romania, and O2 in Ireland. The incident began on Mar 18, 2025 2:02 PM UTC and was resolved by Mar 18, 2025 8:47 PM UTC, lasting roughly 6 hours and 45 minutes and potentially impacting the sending or delivery of SMS messages. In addition, a separate condition affecting a subset of Voice Intelligence transcripts was identified during this period, with some transcripts containing duplicate sentences. The geographic footprint spanned multiple regions, indicating a broad impact on carrier SMS delivery. Twilio issued 8 status updates during the incident as engineers coordinated with carrier partners and the Voice Intelligence team to investigate and resolve the issues, with monitoring and recovery observed over time and region-by-region improvements.

Twilio experienced SMS delivery delays and intermittent failures across a wide range of carrier networks, affecting messages across Bouygues Telecom in France, MTN Nigeria, Verizon in the United States, Roshan in Afghanistan, MTN Uganda, and other carriers. The incident began on 11:12 PM UTC and was resolved by 11:47 AM UTC, lasting about 12 hours and 35 minutes. The service issued 14 status updates during the incident, documenting ongoing maintenance activities and carrier partner efforts as the issue evolved across multiple SMS paths and code types.

Twilio ran scheduled maintenance across multiple SMS carrier networks, impacting message routing in the APAC region (Indonesia via XL Axiata) and in Europe, with Russia also listed in the maintenance window. The APAC carrier entered maintenance at Mar 17, 2025 4:02 PM UTC. In the following hours, additional regions transitioned to maintenance, including Europe and Russia, while APAC began returning to normal.

Twilio experienced a broad, global disruption impacting SMS, MMS, Voice, and related messaging services across multiple regions. Users reported message delivery delays and failures across networks in North America, Europe, APAC, the Middle East & Africa, and LATAM. This outage affected multiple Twilio components, including SMS and MMS Short Code, Long Code, Toll-Free, Voice, and the Verify API, with ancillary issues impacting the Twilio Flex platform in some cases.

Timeline and scope: The incident began around 11:47 PM UTC when Twilio flagged a maintenance window affecting carrier networks. Over the next several days, the Twilio status page logged numerous updates describing ongoing investigations, cross-carrier maintenance, and intermittent recoveries. The most active period spanned roughly from late February 24 through Mar 1, 2025 4:07 PM UTC, with updates continuing into the day as engineers worked with partner carriers to restore service. The outage prompted updates across dozens of components and multiple regions as Twilio worked to diagnose and resolve cross-network disruptions.

What happened and current status: Twilio and carrier partners communicated progress through the status updates, including maintenance notices and monitoring updates as networks recovered. There were periods of partial recovery followed by renewed issues in some regions, and ongoing investigation into root causes (including elevated errors in the Verify API). The incident was global in reach, affecting users across the United States, Europe, APAC, LATAM, and other regions, with a mix of delays and failures across SMS, MMS, and related services. Users should expect continued monitoring and intermittent issues until full restoration, per the latest Twilio status updates.

During a scheduled United States MMS Carrier Partner maintenance window, three North American MMS endpoints were placed in maintenance mode, leading to degraded messaging for users. Concurrently, SMS delivery delays were observed to multiple networks in Mexico via pre-registered sender IDs. The issue affected four components across North America and Latin America (MMS Long Code, MMS Short Code, MMS Toll-Free in North America, and SMS in Latin America).

The outage began on 8:02 PM UTC and was resolved by 11:02 PM UTC, lasting approximately three hours. Over the course of the incident, Twilio issued four status updates detailing the maintenance, observed delays, and the recovery progress. The geographic impact was regional to North America and Latin America, with the most noticeable delays reported for Mexico.

Twilio experienced delays delivering MMS and SMS messages to the T-Mobile network in the United States, affecting users attempting to reach T-Mobile customers. The disruption impacted multiple Twilio paths, including ZIPWHIP MESSAGING SMS Toll-Free and SMS Long Code in North America, as well as the Programmable Messaging MMS and SMS components, resulting in slower delivery and occasional delays.

The outage began at 2:27 PM UTC and was resolved by 4:22 PM UTC. Twilio issued 3 official updates during the incident as engineers worked with the carrier partner to restore service.

The outage began on Feb 17, 2025 4:17 AM UTC and involved widespread SMS delivery delays and failures across multiple carrier networks and messaging paths. The incident touched North America, Europe, APAC, Latin America and the Middle East & Africa, affecting Twilio's CARRIER NETWORK / SMS, MMS and programmable messaging routes. Initial updates cited delays delivering SMS to Tigo in Honduras, with ongoing efforts to resolve with carrier partners. The outage also impacted delivery reports and various codes (short/long codes, toll-free), with some services temporarily degraded or under maintenance.

Twilio issued dozens of updates over several days, including ongoing investigations, in-progress maintenance, and recovery efforts. The latest update as of Feb 22, 2025 6:12 PM UTC indicated continued monitoring and partial recovery in some networks, but no formal confirmation of full resolution. User reports were limited, and the incident demonstrated broad impact across Twilio's messaging components and carrier paths.

Twilio conducted scheduled maintenance for United Arab Emirates SMS Carrier Partner, temporarily affecting the CARRIER NETWORK / SMS, APAC component. The maintenance began at Feb 17, 2025 2:02 AM UTC and ran for about 1 hour 20 minutes, concluding at Feb 17, 2025 3:22 AM UTC. During the window, SMS traffic through the UAE partner and APAC route may have experienced interruptions or delays. The service posted 2 status updates documenting the maintenance progress and its completion, reflecting a planned activity with a return to normal operations after Feb 17, 2025 3:22 AM UTC.

Twilio experienced a broad, multi-day disruption in SMS and MMS delivery beginning at 13:47 UTC on 2025-02-07, with widespread delays across multiple carrier networks and long codes in North America, Europe, APAC, the Middle East & Africa, and Latin America. Users attempting to send messages could see slow delivery or failures as downstream carriers processed traffic. The incident persisted for several days and was documented in recurring status updates through 20:02 UTC on 2025-02-12. The event affected a wide range of networks rather than a single regional service.

The Twilio SMS delivery system experienced a widespread degradation starting on Jan 9, 2025 2:42 PM UTC with delays to Tim Network in Brazil and quickly expanding to further regions and carriers. Users in multiple countries reported delayed or failed SMS messages, including delivery to Chunghwa in Taiwan, Tele2 in Russia, and Shelcomm in the United States, among others. The disruption affected verification messages and other SMS traffic, causing longer wait times and occasional delivery failures. The incident spanned several days and evolved as engineers investigated with carriers and partners to restore normal service.

Twilio published frequent status updates across Carrier Network, Voice, and Twilio Platform components, noting ongoing investigations, maintenance events, and recovery efforts. Updates documented shifts through various regions (APAC, Europe, LATAM, US) and highlighted API-related issues such as AT&T US API Errors impacting Verify and related services, as well as inbound call failures in some Twilio Voice scenarios. The provider continued to monitor and communicate as engineers worked with carrier partners to resolve the issues.

User reports were limited but the pattern suggested broad geographic reach of the impact. The incident was characterized by degraded messaging performance rather than a complete outage, with messages delivered more slowly or not at all in some cases. The outage duration extended through Jan 15, 2025 6:02 PM UTC and remained under active remediation as updates continued.