Possible BGP hijack

Beginning at 2022-04-27 13:57:13, we detected a possible BGP hijack.

Prefix 193.177.160.0/23, Normally announced by AS28878 SIGNET-AS, NL

Starting at 2022-04-27 13:57:13, a more specific route (193.177.161.0/24) was announced by ASN 6830.

This was detected by 2 BGPMon peers.

Expected
Start time: 2022-04-27 13:57:13 UTC
Expected prefix: 193.177.160.0/23
Expected ASN: 28878 (SIGNET-AS, NL)
Event Details
Detected advertisement: 193.177.161.0/24
Detected Origin ASN 6830 (LIBERTYGLOBAL Liberty Global formerly UPC Broadband Holding, aka AORTA, NL)
Detected AS Path 201953 50607 6830
Detected by number of BGPMon peers: 2

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