Possible BGP hijack

Beginning at 2023-09-29 14:08:08 UTC, we detected a possible BGP hijack.

Prefix 212.23.204.0/24, is normally announced by AS211500 AS_NOTAHST, GB.

But beginning at 2023-09-29 14:08:08, the same prefix (212.23.204.0/24) was also announced by ASN 211166.

This was detected by 7 BGPMon peers.

Expected
Start time: 2023-09-29 14:08:08 UTC
Expected prefix: 212.23.204.0/24
Expected ASN: 211500 (AS_NOTAHST, GB)
Event Details
Detected advertisement: 212.23.204.0/24
Detected Origin ASN 211166 (ASSERIZYWEB, GB)
Detected AS Path 201953 50607 6939 43578 49353 49353 49353 211166
Detected by number of BGPMon peers: 7

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