Possible BGP hijack

Beginning at 2021-05-03 22:15:05 UTC, we detected a possible BGP hijack.

Prefix 91.218.48.0/22, is normally announced by AS51250 Unknown.

But beginning at 2021-05-03 22:15:05, the same prefix (91.218.48.0/22) was also announced by ASN 3356.

This was detected by 19 BGPMon peers.

Expected
Start time: 2021-05-03 22:15:05 UTC
Expected prefix: 91.218.48.0/22
Expected ASN: 51250 (Unknown)
Event Details
Detected advertisement: 91.218.48.0/22
Detected Origin ASN 3356 (LEVEL3, US)
Detected AS Path 53070 4230 3356
Detected by number of BGPMon peers: 19

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