Possible BGP hijack

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

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

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

This was detected by 3 BGPMon peers.

Start time: 2021-11-16 13:08:10 UTC
Expected prefix:
Expected ASN: 38731 (VTDC-AS-VN Vietel - CHT Compamy Ltd, VN)
Event Details
Detected advertisement:
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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