Possible BGP hijack

Beginning at 2021-12-06 23:29:14 UTC, we detected a possible BGP hijack.

Prefix 139.241.227.0/24, is normally announced by AS350 DNIC-ASBLK-00306-00371, US.

But beginning at 2021-12-06 23:29:14, the same prefix (139.241.227.0/24) was also announced by ASN 398.

This was detected by 112 BGPMon peers.

Expected
Start time: 2021-12-06 23:29:14 UTC
Expected prefix: 139.241.227.0/24
Expected ASN: 350 (DNIC-ASBLK-00306-00371, US)
Event Details
Detected advertisement: 139.241.227.0/24
Detected Origin ASN 398 (Unknown)
Detected AS Path 393891 6939 3356 209 721 27066 398
Detected by number of BGPMon peers: 112

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