Possible BGP hijack

Beginning at 2023-02-27 07:36:30, we detected a possible BGP hijack.

Prefix 128.9.0.0/20, Normally announced by AS4 ISI-AS, US

Starting at 2023-02-27 07:36:30, a more specific route (128.9.1.0/24) was announced by ASN 328594.

This was detected by 66 BGPMon peers.

Expected
Start time: 2023-02-27 07:36:30 UTC
Expected prefix: 128.9.0.0/20
Expected ASN: 4 (ISI-AS, US)
Event Details
Detected advertisement: 128.9.1.0/24
Detected Origin ASN 328594 (SUDATCHAD-AS, TD)
Detected AS Path 63956 1299 12956 15964 15964 15964 15964 15964 15964 15964 15964 15964 15964 15964 328594 328594 328594
Detected by number of BGPMon peers: 66

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