Possible BGP hijack

Beginning at 2023-03-03 14:01:10 UTC, we detected a possible BGP hijack.

Prefix 155.193.14.0/24, is normally announced by AS28920 CALL27-AS, GB.

But beginning at 2023-03-03 14:01:10, the same prefix (155.193.14.0/24) was also announced by ASN 3257.

This was detected by 2 BGPMon peers.

Expected
Start time: 2023-03-03 14:01:10 UTC
Expected prefix: 155.193.14.0/24
Expected ASN: 28920 (CALL27-AS, GB)
Event Details
Detected advertisement: 155.193.14.0/24
Detected Origin ASN 3257 (GTT-BACKBONE GTT, US)
Detected AS Path 138540 9299 701 3257
Detected by number of BGPMon peers: 2

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