Possible BGP hijack

Beginning at 2020-02-05 17:01:20 UTC, we detected a possible BGP hijack.

Prefix 140.47.0.0/16, is normally announced by AS6500 NEXUS-22-6500, US.

But beginning at 2020-02-05 17:01:20, the same prefix (140.47.0.0/16) was also announced by ASN 5831.

This was detected by 162 BGPMon peers.

Expected
Start time: 2020-02-05 17:01:20 UTC
Expected prefix: 140.47.0.0/16
Expected ASN: 6500 (NEXUS-22-6500, US)
Event Details
Detected advertisement: 140.47.0.0/16
Detected Origin ASN 5831 (DNIC-ASBLK-05800-06055, US)
Detected AS Path 14371 1299 209 721 27064 5831 5831 5831
Detected by number of BGPMon peers: 162

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