Possible BGP hijack

Beginning at 2021-09-27 20:00:55 UTC, we detected a possible BGP hijack.

Prefix 74.199.143.0/24, is normally announced by AS43260 AS43260, TR.

But beginning at 2021-09-27 20:00:55, the same prefix (74.199.143.0/24) was also announced by ASN 3257.

This was detected by 20 BGPMon peers.

Expected
Start time: 2021-09-27 20:00:55 UTC
Expected prefix: 74.199.143.0/24
Expected ASN: 43260 (AS43260, TR)
Event Details
Detected advertisement: 74.199.143.0/24
Detected Origin ASN 3257 (GTT-BACKBONE GTT, US)
Detected AS Path 1126 3549 3356 3257
Detected by number of BGPMon peers: 20

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