Possible BGP hijack

Beginning at 2021-10-19 21:26:43 UTC, we detected a possible BGP hijack.

Prefix 2001:418:1401:1::/64, is normally announced by AS3949 NTTA-3946, US.

But beginning at 2021-10-19 21:26:43, the same prefix (2001:418:1401:1::/64) was also announced by ASN 20940.

This was detected by 2 BGPMon peers.

Expected
Start time: 2021-10-19 21:26:43 UTC
Expected prefix: 2001:418:1401:1::/64
Expected ASN: 3949 (NTTA-3946, US)
Event Details
Detected advertisement: 2001:418:1401:1::/64
Detected Origin ASN 20940 (AKAMAI-ASN1, NL)
Detected AS Path 11039 6461 20940
Detected by number of BGPMon peers: 2

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