Possible BGP hijack

Beginning at 2020-12-20 14:35:50, we detected a possible BGP hijack.

Prefix 64.40.48.0/20, Normally announced by AS7962 EXISNET, US

Starting at 2020-12-20 14:35:50, a more specific route (64.40.56.0/21) was announced by ASN 13259.

This was detected by 128 BGPMon peers.

Expected
Start time: 2020-12-20 14:35:50 UTC
Expected prefix: 64.40.48.0/20
Expected ASN: 7962 (EXISNET, US)
Event Details
Detected advertisement: 64.40.56.0/21
Detected Origin ASN 13259 (DELTA-TELESYSTEMS-AS, RU)
Detected AS Path 138540 9299 6762 12389 13259
Detected by number of BGPMon peers: 128

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