Possible BGP hijack

Beginning at 2020-09-09 16:31:16 UTC, we detected a possible BGP hijack.

Prefix 202.90.172.0/24, is normally announced by AS138342 CSC-AS-AP CSC Australia Pty Ltd, AU.

But beginning at 2020-09-09 16:31:16, the same prefix (202.90.172.0/24) was also announced by ASN 55002.

This was detected by 139 BGPMon peers.

Expected
Start time: 2020-09-09 16:31:16 UTC
Expected prefix: 202.90.172.0/24
Expected ASN: 138342 (CSC-AS-AP CSC Australia Pty Ltd, AU)
Event Details
Detected advertisement: 202.90.172.0/24
Detected Origin ASN 55002 (DEFENSE-NET, US)
Detected AS Path 28646 4230 6453 55002
Detected by number of BGPMon peers: 139

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