Possible BGP hijack

Beginning at 2017-03-18 22:46:51, we detected a possible BGP hijack.

Prefix 91.143.192.0/20, Normally announced by AS21056 Welcome Italia S.p.A

Starting at 2017-03-18 22:46:51, a more specific route (91.143.207.0/24) was announced by ASN 52866.

This was detected by 2 BGPMon peers.

Expected
Start time: 2017-03-18 22:46:51 UTC
Expected prefix: 91.143.192.0/20
Expected ASN: 21056 (Welcome Italia S.p.A)
Event Details
Detected advertisement: 91.143.207.0/24
Detected Origin ASN 52866 (IVeloz Telecom Serv. em Telecomunicacoes LTDA)
Detected AS Path 262544 22177 22177 52866
Detected by number of BGPMon peers: 2

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