Possible BGP hijack

Beginning at 2019-04-22 16:57:40, we detected a possible BGP hijack.

Prefix 194.140.192.0/19, Normally announced by AS197523 DVINFO-AS, HU

Starting at 2019-04-22 16:57:40, a more specific route (194.140.208.0/22) was announced by ASN 57356.

This was detected by 186 BGPMon peers.

Expected
Start time: 2019-04-22 16:57:40 UTC
Expected prefix: 194.140.192.0/19
Expected ASN: 197523 (DVINFO-AS, HU)
Event Details
Detected advertisement: 194.140.208.0/22
Detected Origin ASN 57356 (HIGHNET-AS, GB)
Detected AS Path 55247 21548 3257 174 57356 57356 57356
Detected by number of BGPMon peers: 186

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