Possible BGP hijack

Beginning at 2023-09-26 05:35:42 UTC, we detected a possible BGP hijack.

Prefix 192.171.120.0/21, is normally announced by AS55033 UWI-CH-ASN1, BB.

But beginning at 2023-09-26 05:35:42, the same prefix (192.171.120.0/21) was also announced by ASN 40786.

This was detected by 19 BGPMon peers.

Expected
Start time: 2023-09-26 05:35:42 UTC
Expected prefix: 192.171.120.0/21
Expected ASN: 55033 (UWI-CH-ASN1, BB)
Event Details
Detected advertisement: 192.171.120.0/21
Detected Origin ASN 40786 (Unknown)
Detected AS Path 15296 6327 6461 33576 40786
Detected by number of BGPMon peers: 19

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