Possible BGP hijack

Beginning at 2022-04-13 13:30:55 UTC, we detected a possible BGP hijack.

Prefix 91.208.245.0/24, is normally announced by AS21859 ZEN-ECN, US.

But beginning at 2022-04-13 13:30:55, the same prefix (91.208.245.0/24) was also announced by ASN 38987.

This was detected by 4 BGPMon peers.

Expected
Start time: 2022-04-13 13:30:55 UTC
Expected prefix: 91.208.245.0/24
Expected ASN: 21859 (ZEN-ECN, US)
Event Details
Detected advertisement: 91.208.245.0/24
Detected Origin ASN 38987 (OST-AS, PL)
Detected AS Path 51944 201054 20804 38987 38987 38987
Detected by number of BGPMon peers: 4

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