Possible BGP hijack

Beginning at 2020-01-20 14:29:19 UTC, we detected a possible BGP hijack.

Prefix 91.90.193.0/24, is normally announced by AS21100 ITLDC-NL, UA.

But beginning at 2020-01-20 14:29:19, the same prefix (91.90.193.0/24) was also announced by ASN 204957.

This was detected by 3 BGPMon peers.

Expected
Start time: 2020-01-20 14:29:19 UTC
Expected prefix: 91.90.193.0/24
Expected ASN: 21100 (ITLDC-NL, UA)
Event Details
Detected advertisement: 91.90.193.0/24
Detected Origin ASN 204957 (LAYER6, UA)
Detected AS Path 15547 29222 204957
Detected by number of BGPMon peers: 3

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