Possible BGP hijack

Beginning at 2021-11-16 19:01:23 UTC, we detected a possible BGP hijack.

Prefix 139.27.241.0/24, is normally announced by AS2830 MCI-DUAL-HOMED-CUSTOMERS, NL.

But beginning at 2021-11-16 19:01:23, the same prefix (139.27.241.0/24) was also announced by ASN 8243.

This was detected by 114 BGPMon peers.

Expected
Start time: 2021-11-16 19:01:23 UTC
Expected prefix: 139.27.241.0/24
Expected ASN: 2830 (MCI-DUAL-HOMED-CUSTOMERS, NL)
Event Details
Detected advertisement: 139.27.241.0/24
Detected Origin ASN 8243 (Unknown)
Detected AS Path 16178 174 702 8243 8243
Detected by number of BGPMon peers: 114

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