Incident History

Our engineers have identified the root cause of the SMS delivery failures to Syriatel in Syria. The carrier has begun enforcing Sender ID registration. This means messages to Syriatel can only be delivered when sent from a registered alphanumeric Sender ID; no other Sender ID types are supported.

Please note that in July 2025, Twilio announced through direct customer communications that SMS delivery to Syria will no longer be supported starting September 15, 2025. Customers were advised to remove Syria traffic from Twilio and transition to alternative messaging providers.

From now until September 15, 2025, SMS delivery to Syriatel in Syria will be on a best-effort basis only. If messages fail, Twilio will not be able to provide troubleshooting support. After September 15, 2025, all messaging traffic to Syria will be blocked.

We are no longer experiencing delivery report delays when sending to Claro in Peru. This incident has been resolved.

We are no longer experiencing delivery report delays when sending messages to Algar Telecom (CTBC) in Brazil. This incident has been resolved.

We are no longer experiencing SMS delivery delays when sending messages to Shelcomm Network in the US. This incident has been resolved.

We are no longer experiencing SMS delivery delays when sending messages to Tigo Network in Honduras. This incident has been resolved.

We are no longer experiencing SMS delivery delays when sending messages to Algar Telecom (CTBC) in Brazil. This incident has been resolved.

This incident has been resolved.

No customer impact.

Twilio Voice Service was degraded for 2,050 minutes between 08/06/2025 at 06:20 Pacific Time and 08/08/2025 at 04:30 Pacific Time. During this period of time customers may have experienced call failures from Colombian Network Subscribers to a subset of Twilio's numbers in Colombia . The issue has now been resolved.

Twilio Programmable Messaging was degraded for 32 minutes between 23:09 and 23:41 Pacific Time on 08/12/2025. During this period of time customers may have experienced SMS delivery delays and failures to Multiple Networks in Mexico for a subset of shortcodes and alphanumeric sender IDs. The issue has now been resolved.