Possible BGP hijack

Beginning at 2021-11-16 13:08:10, we detected a possible BGP hijack.

Prefix 171.244.0.0/22, Normally announced by AS38731 VTDC-AS-VN Vietel - CHT Compamy Ltd, VN

Starting at 2021-11-16 13:08:10, a more specific route (171.244.3.68/32) was announced by ASN 21859.

This was detected by 3 BGPMon peers.

Expected
Start time: 2021-11-16 13:08:10 UTC
Expected prefix: 171.244.0.0/22
Expected ASN: 38731 (VTDC-AS-VN Vietel - CHT Compamy Ltd, VN)
Event Details
Detected advertisement: 171.244.3.68/32
Detected Origin ASN 21859 (ZEN-ECN, US)
Detected AS Path 37989 56300 132132 21859
Detected by number of BGPMon peers: 3

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