Possible BGP hijack

Beginning at 2021-04-21 14:16:01 UTC, we detected a possible BGP hijack.

Prefix, is normally announced by AS139021 WEST263GO-HK West263 International Limited, HK.

But beginning at 2021-04-21 14:16:01, the same prefix ( was also announced by ASN 4842.

This was detected by 3 BGPMon peers.

Start time: 2021-04-21 14:16:01 UTC
Expected prefix:
Expected ASN: 139021 (WEST263GO-HK West263 International Limited, HK)
Event Details
Detected advertisement:
Detected Origin ASN 4842 (TH-AS-AP Tianhai InfoTech, CN)
Detected AS Path 48200 4809 23764 4842 4842
Detected by number of BGPMon peers: 3

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