Possible BGP hijack

Beginning at 2019-05-18 16:46:09 UTC, we detected a possible BGP hijack.

Prefix 120.55.0.0/17, is normally announced by AS37963 CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.

But beginning at 2019-05-18 16:46:09, the same prefix (120.55.0.0/17) was also announced by ASN 45786.

This was detected by 33 BGPMon peers.

Expected
Start time: 2019-05-18 16:46:09 UTC
Expected prefix: 120.55.0.0/17
Expected ASN: 37963 (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN)
Event Details
Detected advertisement: 120.55.0.0/17
Detected Origin ASN 45786 (HTSNET-AS-ID HTSNET - ISP, ID)
Detected AS Path 819 6939 136106 45786
Detected by number of BGPMon peers: 33

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