Possible BGP hijack

Beginning at 2023-08-29 00:37:36 UTC, we detected a possible BGP hijack.

Prefix 2001:df2:c900::/48, is normally announced by AS38635 KEIO-NET Keio University, JP.

But beginning at 2023-08-29 00:37:36, the same prefix (2001:df2:c900::/48) was also announced by ASN 266970.

This was detected by 2 BGPMon peers.

Start time: 2023-08-29 00:37:36 UTC
Expected prefix: 2001:df2:c900::/48
Expected ASN: 38635 (KEIO-NET Keio University, JP)
Event Details
Detected advertisement: 2001:df2:c900::/48
Detected Origin ASN 266970 ()
Detected AS Path 202365 50673 33891 3356 4230 61678 266970
Detected by number of BGPMon peers: 2

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