Possible BGP hijack

Beginning at 2023-11-22 21:10:21 UTC, we detected a possible BGP hijack.

Prefix, is normally announced by AS5 SYMBOLICS, US.

But beginning at 2023-11-22 21:10:21, the same prefix ( was also announced by ASN 4.

This was detected by 2 BGPMon peers.

Start time: 2023-11-22 21:10:21 UTC
Expected prefix:
Expected ASN: 5 (SYMBOLICS, US)
Event Details
Detected advertisement:
Detected Origin ASN 4 (ISI-AS, US)
Detected AS Path 11071 37468 265038 264969 270928 4
Detected by number of BGPMon peers: 2

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