Current status

Seattle: China Unicom (AS4837)Elevated latency and packet loss
Degraded
Seattle: China Unicom (AS9929, to Telecom only)Elevated latency and packet loss
Degraded
Seattle: all other networks
Operational
All other locations
Operational

Active incident

China Unicom network failure

10 November 2026 · Started 11:00 UTC · Ongoing

There is currently a failure in the China Unicom network as of 11:00am UTC. This is causing elevated latency and packet loss for both AS4837 and AS9929 (to Telecom only).

This affects our Seattle location only.

Location
Seattle
Networks
AS4837, AS9929 (to Telecom only)
Impact
Elevated latency and packet loss

Updates

MonitoringChina Unicom has informed us that there is a submarine cable fault causing the AS4837 and AS9929 congestion. There is no estimated fix date available yet. We use AS4837 to reach Telecom, Unicom and Mobile. We will continue to optimise the route as much as possible daily, but all alternatives for AS4837 also suffer heavy congestion at peak time.
MonitoringAS4837 is continuing to have very high congestion, there is no ideal alternative routes and we have not received an estimated fix date from China Unicom yet.

CMIN2 to China Telecom became very congested between 12pm and 2:20pm today (12th November), we'll re-route this to something with less packet loss during the same time tomorrow. AS9929 is continuing to have major packet loss to China Telecom for most of the day, therefore cannot be permanently used.
MonitoringFor AS9929, we have re-routed China Telecom to CMIN2, which is performing well.
We are continuing to monitor AS4837. It is suffering congestion daily during peak time due to the China Unicom backbone failure.
InvestigatingWe have been informed of an AS9929 backbone fault. China Unicom is investigating.
OngoingA failure in the China Unicom network is causing elevated latency and packet loss for AS4837 and AS9929 (to Telecom only). Seattle location only.