Iran experienced a significant disruption to its internet control plane on September 1, 2026. The event lasted for approximately nine hours and forty minutes, beginning around 13:25 UTC and concluding near 23:05 UTC. The primary impact was observed on the Border Gateway Protocol (BGP) signal, which registered a severity score of 926.
Technical Details
The disruption was characterized by a degradation in the BGP signal, which measures the stability and visibility of routing announcements for the country’s IP address prefixes. The median BGP visibility dropped by approximately 2% from its peak during the event. Other network health indicators, including active probing for IPv4 reachability and traffic volume forecasts, showed minor deviations but were not the primary signals affected. The cause has not been publicly attributed.
The disruption remained ongoing at last observation.
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