Possible BGP hijack

Beginning at 2019-07-03 19:01:56 UTC, we detected a possible BGP hijack.

Prefix 121.46.20.0/22, is normally announced by AS135391 AOFEI-HK AOFEI DATA INTERNATIONAL COMPANY LIMITED, HK.

But beginning at 2019-07-03 19:01:56, the same prefix (121.46.20.0/22) was also announced by ASN 58844.

This was detected by 2 BGPMon peers.

Expected
Start time: 2019-07-03 19:01:56 UTC
Expected prefix: 121.46.20.0/22
Expected ASN: 135391 (AOFEI-HK AOFEI DATA INTERNATIONAL COMPANY LIMITED, HK)
Event Details
Detected advertisement: 121.46.20.0/22
Detected Origin ASN 58844 (Unknown)
Detected AS Path 267170 28140 4809 4134 4837 17816 58844
Detected by number of BGPMon peers: 2

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