Possible BGP hijack

Beginning at 2020-05-31 14:17:49 UTC, we detected a possible BGP hijack.

Prefix 23.129.240.0/24, is normally announced by AS397418 SYNAMEDIA, US.

But beginning at 2020-05-31 14:17:49, the same prefix (23.129.240.0/24) was also announced by ASN 45753.

This was detected by 17 BGPMon peers.

Expected
Start time: 2020-05-31 14:17:49 UTC
Expected prefix: 23.129.240.0/24
Expected ASN: 397418 (SYNAMEDIA, US)
Event Details
Detected advertisement: 23.129.240.0/24
Detected Origin ASN 45753 (NETSEC-HK NETSEC, HK)
Detected AS Path 28329 13786 7195 22356 3491 3491 58453 45753
Detected by number of BGPMon peers: 17

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