Possible BGP hijack

Beginning at 2021-12-28 20:59:36, we detected a possible BGP hijack.

Prefix 11.0.0.0/8, Normally announced by AS749 DNIC-AS-00749, US

Starting at 2021-12-28 20:59:36, a more specific route (11.172.204.0/23) was announced by ASN 22381.

This was detected by 12 BGPMon peers.

Expected
Start time: 2021-12-28 20:59:36 UTC
Expected prefix: 11.0.0.0/8
Expected ASN: 749 (DNIC-AS-00749, US)
Event Details
Detected advertisement: 11.172.204.0/23
Detected Origin ASN 22381 (Megatelecom Telecomunicacoes Ltda, BR)
Detected AS Path 52694 270341 11432 22381
Detected by number of BGPMon peers: 12

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