Incident History

We are resolving this incident as we found that the main cause is that some of our customers are unable to comply with the requirements from our service providers that caused the observed call failures. The next actions are for these customers to submit all the necessary configurations for them to be compliant, which is currently a work in progress.

This incident has been resolved.

We are no longer experiencing MMS delivery delays when sending messages to Bell network in Canada for a subset of long codes. This incident has been resolved.

Twilio ConversationRelay was degraded for 32 hours and 13 minutes between 2:49 PM on 10/28/2025 and 11:02 AM Pacific Time on 10/30/2025. During this period, customers may have experienced silence on calls when audio data sent via the websocket server was not converted to speech as expected after the caller barged in and interrupted. The issue has now been resolved.

We are no longer experiencing SMS delivery failures from multiple networks in Switzerland towards Twilio numbers.. This incident has been resolved.

We are no longer experiencing SMS delivery delays and failures when sending messages to Asia Cell network in Iraq. This incident has been resolved.

We are no longer experiencing SMS delivery delays to MobiFone network in Vietnam via a subset of long code numbers & alphanumeric senders. This incident has been resolved.

Some messages created between 05:30 and 05:40 UTC on Oct 28 may not be retrievable via the Messaging Logs API or visible in the Messaging Console. Message delivery was not affected. This incident has been resolved

In reference to previous incident https://status.twilio.com/incidents/2m0wy7gyl7bx, Following an amendment to Decree 4/2012 (I.24), calls made to Hungary using fixed or geographic numbers (like +36 1-9...) as a CLI are now likely to be blocked by local carriers, as of October 15, 2025. This will expand to mobile numbers (like +36 20, 30, 70...) starting June 1, 2026.

This means calls made with Transit Caller ID and Verified Caller ID will be delivered by Twilio on a best-effort basis when you're using a Hungarian CLI.

Recommended steps:

• For calls made into Hungary using Verified Caller ID or Transit Caller ID avoid using Hungarian numbers (+36 1-9… and +36 20, 30, 70...) as your CLI as the calls are likely to be blocked.
• If a Hungary CLI isn’t a priority for your use case, use a non-Hungarian CLI like your main business or international service number. If you need one, you can quickly get a United States (+1) number right in the Twilio Console to use for these calls.

If you observe abnormal failure patterns, please reach out to Twilio Support for further assistance.

We are no longer experiencing SMS delivery delays when sending messages to Altan Redes network in Mexico. This incident has been resolved.