Possible BGP hijack

Beginning at 2019-12-18 18:41:50, we detected a possible BGP hijack.

Prefix, Normally announced by AS51490 PROPER-AS, GB

Starting at 2019-12-18 18:41:50, a more specific route ( was announced by ASN 398217.

This was detected by 50 BGPMon peers.

Start time: 2019-12-18 18:41:50 UTC
Expected prefix:
Expected ASN: 51490 (PROPER-AS, GB)
Event Details
Detected advertisement:
Detected Origin ASN 398217 (US-AS, US)
Detected AS Path 33362 6939 3223 398217
Detected by number of BGPMon peers: 50

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