Service Impact on Cigo Tracker due to Azure Regional Outage
On March 18, 2025, Cigo Tracker experienced intermittent service disruption due to a regional outage within Microsoft Azure’s East US data center region. Below is a summary of the root cause, impact, and the steps being taken to prevent future occurrences.
Azure’s East US region suffered two separate impact windows:
The incident was triggered by a third-party fiber cut during external drilling work, which caused reduced network capacity in one of Azure’s Availability Zones. A tooling failure during Azure's recovery efforts later reintroduced traffic prematurely, leading to congestion and a second round of intermittent connectivity issues.
While the Azure issue only affected a subset of inter-zone traffic in East US, this included infrastructure we rely on, resulting in intermittent connectivity issues for some customers during the incident windows. Core services were restored once Azure manually completed isolation and fiber recovery work.
We apologize for the inconvenience caused. Please rest assured that our team is working closely with Azure and continuing to invest in the resiliency of our platform.
If you have any questions or would like help designing a more resilient setup, feel free to reach out to our support team.
Thank you for your continued trust