Possible BGP hijack

Beginning at 2019-03-14 13:05:40, we detected a possible BGP hijack.

Prefix 20.0.0.0/11, Normally announced by AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US

Starting at 2019-03-14 13:05:40, a more specific route (20.20.20.0/24) was announced by ASN 28598.

This was detected by 137 BGPMon peers.

Expected
Start time: 2019-03-14 13:05:40 UTC
Expected prefix: 20.0.0.0/11
Expected ASN: 8075 (MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US)
Event Details
Detected advertisement: 20.20.20.0/24
Detected Origin ASN 28598 (Mob Servicos de Telecomunicacoes Ltda, BR)
Detected AS Path 29430 13030 1299 12956 28598
Detected by number of BGPMon peers: 137

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