Possible BGP hijack

Beginning at 2019-11-02 05:20:00, we detected a possible BGP hijack.

Prefix 12.128.0.0/9, Normally announced by AS7018 ATT-INTERNET4 - AT&T Services, Inc., US

Starting at 2019-11-02 05:20:00, a more specific route (12.172.224.0/23) was announced by ASN 26617.

This was detected by 64 BGPMon peers.

Expected
Start time: 2019-11-02 05:20:00 UTC
Expected prefix: 12.128.0.0/9
Expected ASN: 7018 (ATT-INTERNET4 - AT&T Services, Inc., US)
Event Details
Detected advertisement: 12.172.224.0/23
Detected Origin ASN 26617 (Navega.com S.A., GT)
Detected AS Path 393891 174 1299 262206 26617
Detected by number of BGPMon peers: 64

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