Possible BGP hijack

Beginning at 2020-12-08 19:08:21, we detected a possible BGP hijack.

Prefix 172.0.0.0/12, Normally announced by AS7018 ATT-INTERNET4, US

Starting at 2020-12-08 19:08:21, a more specific route (172.11.0.0/24) was announced by ASN 28618.

This was detected by 23 BGPMon peers.

Expected
Start time: 2020-12-08 19:08:21 UTC
Expected prefix: 172.0.0.0/12
Expected ASN: 7018 (ATT-INTERNET4, US)
Event Details
Detected advertisement: 172.11.0.0/24
Detected Origin ASN 28618 (Linktel Telecom do Brasil Ltda, BR)
Detected AS Path 15547 8220 14840 28618
Detected by number of BGPMon peers: 23

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