Possible BGP hijack

Beginning at 2020-07-20 17:23:40 UTC, we detected a possible BGP hijack.

Prefix 2001:500:a8::/48, is normally announced by AS21556 NARC-EROOT, US.

But beginning at 2020-07-20 17:23:40, the same prefix (2001:500:a8::/48) was also announced by ASN 18809.

This was detected by 2 BGPMon peers.

Start time: 2020-07-20 17:23:40 UTC
Expected prefix: 2001:500:a8::/48
Expected ASN: 21556 (NARC-EROOT, US)
Event Details
Detected advertisement: 2001:500:a8::/48
Detected Origin ASN 18809 (Cable Onda, PA)
Detected AS Path 7018 1299 18809
Detected by number of BGPMon peers: 2

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