US7 site - Degradation

What to do

• Check whether you use Sinch SMPP - US, ENUM US, HTTP - US, HTTP US in us. 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 15h 34m it lasted.

  Anything that failed between 2026-03-18 21:52 UTC and 2026-03-19 13:27 UTC may need a replay.

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

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

Updates from Sinch 4

1. investigatingMar 18, 2026, 9:52 PM UTC

   Dear Client, We are currently experiencing a performance degradation on our US7 site. To minimize impact, clients are advised to temporarily connect to the designated redundant site US1 for the duration of this issue. Affected Site: US7 Recommended Redundant Site: US1 Alternative Endpoints: us1.smpp.api.sinch.com us1.httpsms.api.sinch.com us1.httplookup.api.sinch.com Our teams are actively investigating and working to resolve the issue as quickly as possible. If you have any questions, please contact support@sinch.com.

   provider

2. monitoringMar 19, 2026, 2:46 AM UTC

   A fix has been implemented and we are monitoring the results.

   provider

3. monitoringMar 19, 2026, 5:07 AM UTC

   We are continuing to monitor for any further issues.

   provider

4. resolvedMar 19, 2026, 1:27 PM UTC

   This incident has been resolved. Incident Start Time: 2026-03-18 16:30 UTC Incident End Time: 2026-03-19 12:40 UTC

   provider

Corrections

None so far.

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