Possible BGP hijack

Beginning at 2020-11-21 15:15:29 UTC, we detected a possible BGP hijack.

Prefix 193.163.208.0/21, is normally announced by AS50062 Unknown.

But beginning at 2020-11-21 15:15:29, the same prefix (193.163.208.0/21) was also announced by ASN 3257.

This was detected by 140 BGPMon peers.

Expected
Start time: 2020-11-21 15:15:29 UTC
Expected prefix: 193.163.208.0/21
Expected ASN: 50062 (Unknown)
Event Details
Detected advertisement: 193.163.208.0/21
Detected Origin ASN 3257 (GTT-BACKBONE GTT, US)
Detected AS Path 61951 262765 16735 174 3257
Detected by number of BGPMon peers: 140

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