Possible BGP hijack

Beginning at 2020-07-12 21:50:21 UTC, we detected a possible BGP hijack.

Prefix 37.139.144.0/21, is normally announced by AS42739 FONE-ASN, PL.

But beginning at 2020-07-12 21:50:21, the same prefix (37.139.144.0/21) was also announced by ASN 45753.

This was detected by 2 BGPMon peers.

Expected
Start time: 2020-07-12 21:50:21 UTC
Expected prefix: 37.139.144.0/21
Expected ASN: 42739 (FONE-ASN, PL)
Event Details
Detected advertisement: 37.139.144.0/21
Detected Origin ASN 45753 (NETSEC-HK NETSEC, HK)
Detected AS Path 63956 3491 58453 45753
Detected by number of BGPMon peers: 2

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