Possible BGP hijack

Beginning at 2021-05-30 04:44:15 UTC, we detected a possible BGP hijack.

Prefix 204.154.174.0/23, is normally announced by AS18499 Unknown.

But beginning at 2021-05-30 04:44:15, the same prefix (204.154.174.0/23) was also announced by ASN 174.

This was detected by 125 BGPMon peers.

Expected
Start time: 2021-05-30 04:44:15 UTC
Expected prefix: 204.154.174.0/23
Expected ASN: 18499 (Unknown)
Event Details
Detected advertisement: 204.154.174.0/23
Detected Origin ASN 174 (COGENT-174, US)
Detected AS Path 209218 20473 1299 174
Detected by number of BGPMon peers: 125

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