Possible BGP hijack

Beginning at 2019-04-03 10:30:10 UTC, we detected a possible BGP hijack.

Prefix 139.66.204.0/22, is normally announced by AS2386 INS-AS - AT&T Data Communications Services, US.

But beginning at 2019-04-03 10:30:10, the same prefix (139.66.204.0/22) was also announced by ASN 1759.

This was detected by 115 BGPMon peers.

Expected
Start time: 2019-04-03 10:30:10 UTC
Expected prefix: 139.66.204.0/22
Expected ASN: 2386 (INS-AS - AT&T Data Communications Services, US)
Event Details
Detected advertisement: 139.66.204.0/22
Detected Origin ASN 1759 (TSF-IP-CORE Telia Finland Oyj, FI)
Detected AS Path 33891 1299 1759
Detected by number of BGPMon peers: 115

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