Possible BGP hijack

Beginning at 2020-07-05 06:07:05 UTC, we detected a possible BGP hijack.

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

But beginning at 2020-07-05 06:07:05, the same prefix ( was also announced by ASN 2147483647.

This was detected by 3 BGPMon peers.

Start time: 2020-07-05 06:07:05 UTC
Expected prefix:
Expected ASN: 37963 (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN)
Event Details
Detected advertisement:
Detected Origin ASN 2147483647 ()
Detected AS Path 4608 9498 134331 45102 45102 4200015045
Detected by number of BGPMon peers: 3

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