Possible BGP hijack

Beginning at 2018-11-20 12:40:21, we detected a possible BGP hijack.

Prefix 191.249.0.0/18, Normally announced by AS18881 TELEFÔNICA BRASIL S.A

Starting at 2018-11-20 12:40:21, a more specific route (191.249.4.122/32) was announced by ASN 8859.

This was detected by 3 BGPMon peers.

Expected
Start time: 2018-11-20 12:40:21 UTC
Expected prefix: 191.249.0.0/18
Expected ASN: 18881 (TELEFÔNICA BRASIL S.A)
Event Details
Detected advertisement: 191.249.4.122/32
Detected Origin ASN 8859 (OSN Online Service Nuernberg GmbH)
Detected AS Path 553 8859
Detected by number of BGPMon peers: 3

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