Possible BGP hijack

Beginning at 2022-04-25 20:36:30, we detected a possible BGP hijack.

Prefix 147.230.0.0/15, Normally announced by AS2852 CESNET2, CZ

Starting at 2022-04-25 20:36:30, a more specific route (147.230.171.0/24) was announced by ASN 400.

This was detected by 56 BGPMon peers.

Expected
Start time: 2022-04-25 20:36:30 UTC
Expected prefix: 147.230.0.0/15
Expected ASN: 2852 (CESNET2, CZ)
Event Details
Detected advertisement: 147.230.171.0/24
Detected Origin ASN 400 (AFCONC-BLOCK1-AS, US)
Detected AS Path 48659 29535 5511 6762 6762 3223 49025 100 200 400
Detected by number of BGPMon peers: 56

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