Possible BGP hijack

Beginning at 2023-09-08 13:34:10, we detected a possible BGP hijack.

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

Starting at 2023-09-08 13:34:10, a more specific route (172.10.10.0/24) was announced by ASN 1820.

This was detected by 7 BGPMon peers.

Expected
Start time: 2023-09-08 13:34:10 UTC
Expected prefix: 172.0.0.0/12
Expected ASN: 7018 (ATT-INTERNET4, US)
Event Details
Detected advertisement: 172.10.10.0/24
Detected Origin ASN 1820 (WNET, US)
Detected AS Path 48200 1820
Detected by number of BGPMon peers: 7

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