Mobile internet traffic from multiple carriers in Europe took an unintended turn through China Telecom for over two hours on June 6 because of a route leak incident. The problem occurred at Safe Host, a Swiss data center collocation company identified with the autonomous system number (ASN) AS21217. Among the most impacted networks were Swisscom (AS3303), KPN (AS1130) of Holland, Bouygues Telecom (AS5410) and Numericable-SFR (AS21502) of France.
Source: https://www.bleepingcomputer.com/news/security/china-routed-traffic-from-european-carriers-for-two-hours/