Incident S2 CORP-45409 on Sigfox Network

Update timeline

1. investigating Apr 13, 2026, 12:45 AM UTC

   Please be advised there is an incident on Sigfox network Analysis of the root cause is still on-going and will be communicated to you as soon as possible. Incident reference CORP-45409 Severity S2 Service Impact Uplink messages capture - UP Uplink message storage and archiving - UP Uplink callbacks dispatch - FAILING Uplink callbacks retrieval ("callback not sent" status) - WILL BE PARTIALLY AVAILABLE FOLLOWING THE INCIDENT Downlink sequences - FAILING Downlink customer platform call backs - FAILING API service - UP backend.sigfox.com access - UP Start Date and Time 04/13/26 02:09 AM CEST Root cause analysis Analysis on-going

2. identified Apr 13, 2026, 01:23 AM UTC

   The issue has been identified. Callbacks instances have been restarted following a lock of the services. Impact on callbacks success rate seems low due to retry mechanisms, only delayed dispatching. Downlink sequences have been impacted due to this delay. Backend portal is down but does not impact the connectivity services, messages are still processed.

3. monitoring Apr 13, 2026, 04:18 AM UTC

   The downlink service and the backend have been restored. All services should be nominal. We are still closely monitoring the situation and will continue investigating on the root cause. A Problem Management process will be held, and an Incident Report will be communicated as soon as we have determined the root cause.

4. resolved Apr 13, 2026, 12:13 PM UTC

   The incident is confirmed as Resolved after the monitoring period. We will continue investigating and proceed to corrective actions, and build a detailed Incident Report