Possible BGP hijack

Beginning at 2019-07-19 20:13:44, we detected a possible BGP hijack.

Prefix 139.28.172.0/22, Normally announced by AS60781 LEASEWEB-NL-AMS-01 Netherlands, NL

Starting at 2019-07-19 20:13:44, a more specific route (139.28.173.0/24) was announced by ASN 209128.

This was detected by 166 BGPMon peers.

Expected
Start time: 2019-07-19 20:13:44 UTC
Expected prefix: 139.28.172.0/22
Expected ASN: 60781 (LEASEWEB-NL-AMS-01 Netherlands, NL)
Event Details
Detected advertisement: 139.28.173.0/24
Detected Origin ASN 209128 (SPEEDYINTERNET, GB)
Detected AS Path 49605 3356 6762 6898 6898 6898 42624 51852 209128
Detected by number of BGPMon peers: 166

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