Possible BGP hijack

Beginning at 2021-04-25 17:21:49 UTC, we detected a possible BGP hijack.

Prefix 187.84.126.0/24, is normally announced by AS271033 FLAY NET TELECOM, BR.

But beginning at 2021-04-25 17:21:49, the same prefix (187.84.126.0/24) was also announced by ASN 10.

This was detected by 71 BGPMon peers.

Expected
Start time: 2021-04-25 17:21:49 UTC
Expected prefix: 187.84.126.0/24
Expected ASN: 271033 (FLAY NET TELECOM, BR)
Event Details
Detected advertisement: 187.84.126.0/24
Detected Origin ASN 10 (CSNET-EXT-AS, US)
Detected AS Path 16178 174 52320 17222 271587 271587 271587 271587 271587 271587 271587 10
Detected by number of BGPMon peers: 71

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