Possible BGP hijack

Beginning at 2023-07-27 13:21:59 UTC, we detected a possible BGP hijack.

Prefix, is normally announced by AS31837 LION-BILLERICA, US.

But beginning at 2023-07-27 13:21:59, the same prefix ( was also announced by ASN 205419.

This was detected by 2 BGPMon peers.

Start time: 2023-07-27 13:21:59 UTC
Expected prefix:
Expected ASN: 31837 (LION-BILLERICA, US)
Event Details
Detected advertisement:
Detected Origin ASN 205419 (PL-LIONBRIDGE, US)
Detected AS Path 49463 8218 24724 205419
Detected by number of BGPMon peers: 2

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