Possible BGP hijack

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

Prefix 2001:500:2e::/47, Normally announced by AS3557 ISC-AS, US

Starting at 2020-07-20 17:23:40, a more specific route (2001:500:2f::/48) was announced by ASN 18809.

This was detected by 4 BGPMon peers.

Expected
Start time: 2020-07-20 17:23:40 UTC
Expected prefix: 2001:500:2e::/47
Expected ASN: 3557 (ISC-AS, US)
Event Details
Detected advertisement: 2001:500:2f::/48
Detected Origin ASN 18809 (Cable Onda, PA)
Detected AS Path 8283 1299 18809
Detected by number of BGPMon peers: 4

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