Possible BGP hijack

Beginning at 2021-02-27 01:25:06, we detected a possible BGP hijack.

Prefix 2402:9d80:300::/40, Normally announced by AS131429 MOBIFONE-AS-VN MOBIFONE Corporation, VN

Starting at 2021-02-27 01:25:06, a more specific route (2402:9d80:384::/48) was announced by ASN 269684.

This was detected by 3 BGPMon peers.

Expected
Start time: 2021-02-27 01:25:06 UTC
Expected prefix: 2402:9d80:300::/40
Expected ASN: 131429 (MOBIFONE-AS-VN MOBIFONE Corporation, VN)
Event Details
Detected advertisement: 2402:9d80:384::/48
Detected Origin ASN 269684 (LANFIBRA TELECOMUNICACOES - EIRELI, BR)
Detected AS Path 52694 266539 269684
Detected by number of BGPMon peers: 3

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