Possible BGP hijack

Beginning at 2023-04-30 14:13:02 UTC, we detected a possible BGP hijack.

Prefix, is normally announced by AS397423 TIER-NET, US.

But beginning at 2023-04-30 14:13:02, the same prefix ( was also announced by ASN 138456.

This was detected by 15 BGPMon peers.

Start time: 2023-04-30 14:13:02 UTC
Expected prefix:
Expected ASN: 397423 (TIER-NET, US)
Event Details
Detected advertisement:
Detected Origin ASN 138456 (OCTL-AS-AP OceanBlue Cloud Technology Limited, HK)
Detected AS Path 34019 35280 138456 138456
Detected by number of BGPMon peers: 15

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