SMS Delivery Delays From a Subset of Twilio Registered Sender IDs to Telenor Serbia

What to do

• Check whether you use Twilio SMS, Europe in eu. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 2h 35m it lasted.

  Anything that failed between 2026-03-13 11:20 UTC and 2026-03-13 13:55 UTC may need a replay.

• Subscribe to Twilio's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=twilio works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Twilio 3

1. investigatingMar 13, 2026, 11:20 AM UTC

   Twilio customers may be experiencing SMS delivery delays from a subset of Twilio Registered Sender IDs to Telenor network subscribers in Serbia. Our team is actively investigating this issue. We will provide another update in 1 hour or as soon as more information becomes available.

   provider

2. monitoringMar 13, 2026, 12:05 PM UTC

   We are observing recovery in SMS delivery delays when sending messages from a subset of Twilio Registered Sender IDs to Telenor network subscribers in Serbia. We will continue monitoring the service to ensure a full recovery. We will provide another update in 2 hours or as soon as more information becomes available.

   provider

3. resolvedMar 13, 2026, 1:55 PM UTC

   We are no longer experiencing MMS/SMS delivery delays when sending messages from a subset of Twilio Registered Sender IDs to Telenor network subscribers in Serbia. This incident has been resolved.

   provider

Corrections

None so far.

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