Possible BGP hijack

Beginning at 2021-12-09 11:13:32 UTC, we detected a possible BGP hijack.

Prefix 185.139.216.0/22, is normally announced by AS49142 HBO, CZ.

But beginning at 2021-12-09 11:13:32, the same prefix (185.139.216.0/22) was also announced by ASN 2686.

This was detected by 56 BGPMon peers.

Expected
Start time: 2021-12-09 11:13:32 UTC
Expected prefix: 185.139.216.0/22
Expected ASN: 49142 (HBO, CZ)
Event Details
Detected advertisement: 185.139.216.0/22
Detected Origin ASN 2686 (ATGS-MMD-AS, US)
Detected AS Path 201971 6939 7018 2686
Detected by number of BGPMon peers: 56

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