Possible BGP hijack

Beginning at 2019-09-16 17:20:00, we detected a possible BGP hijack.

Prefix 186.236.208.0/21, Normally announced by AS28220 CABO SERVICOS DE TELECOMUNICACOES LTDA, BR

Starting at 2019-09-16 17:20:00, a more specific route (186.236.214.0/23) was announced by ASN 3816.

This was detected by 72 BGPMon peers.

Expected
Start time: 2019-09-16 17:20:00 UTC
Expected prefix: 186.236.208.0/21
Expected ASN: 28220 (CABO SERVICOS DE TELECOMUNICACOES LTDA, BR)
Event Details
Detected advertisement: 186.236.214.0/23
Detected Origin ASN 3816 (COLOMBIA TELECOMUNICACIONES S.A. ESP, CO)
Detected AS Path 24751 47605 1299 12956 3816
Detected by number of BGPMon peers: 72

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