Possible BGP hijack

Beginning at 2021-12-13 23:17:42 UTC, we detected a possible BGP hijack.

Prefix 23.180.240.0/24, is normally announced by AS7018 ATT-INTERNET4, US.

But beginning at 2021-12-13 23:17:42, the same prefix (23.180.240.0/24) was also announced by ASN 399581.

This was detected by 16 BGPMon peers.

Expected
Start time: 2021-12-13 23:17:42 UTC
Expected prefix: 23.180.240.0/24
Expected ASN: 7018 (ATT-INTERNET4, US)
Event Details
Detected advertisement: 23.180.240.0/24
Detected Origin ASN 399581 ()
Detected AS Path 63956 3491 3257 13876 399581
Detected by number of BGPMon peers: 16

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