Possible BGP hijack

Beginning at 2018-10-29 18:42:56, we detected a possible BGP hijack.

Prefix 121.46.156.0/22, Normally announced by AS135391 AOFEI DATA INTERNATIONAL COMPANY LIMITED

Starting at 2018-10-29 18:42:56, a more specific route (121.46.158.0/23) was announced by ASN 136958.

This was detected by 77 BGPMon peers.

Expected
Start time: 2018-10-29 18:42:56 UTC
Expected prefix: 121.46.156.0/22
Expected ASN: 135391 (AOFEI DATA INTERNATIONAL COMPANY LIMITED)
Event Details
Detected advertisement: 121.46.158.0/23
Detected Origin ASN 136958 (UNICOM-GUANGZHOU-IDC China Unicom Guangdong IP network, CN)
Detected AS Path 49673 48858 1299 4837 136958 136958
Detected by number of BGPMon peers: 77

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