Possible BGP hijack

Beginning at 2021-12-15 15:16:52 UTC, we detected a possible BGP hijack.

Prefix 210.83.224.0/24, is normally announced by AS17623 CNCGROUP-SZ China Unicom Shenzen network, CN.

But beginning at 2021-12-15 15:16:52, the same prefix (210.83.224.0/24) was also announced by ASN 138873.

This was detected by 2 BGPMon peers.

Expected
Start time: 2021-12-15 15:16:52 UTC
Expected prefix: 210.83.224.0/24
Expected ASN: 17623 (CNCGROUP-SZ China Unicom Shenzen network, CN)
Event Details
Detected advertisement: 210.83.224.0/24
Detected Origin ASN 138873 (IDNIC-GREENET-AS-ID PT GREEN NET INDONESIA, ID)
Detected AS Path 138540 4775 138840 138873
Detected by number of BGPMon peers: 2

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