Possible BGP hijack

Beginning at 2020-02-04 17:56:12 UTC, we detected a possible BGP hijack.

Prefix 138.204.240.0/24, is normally announced by AS5 SYMBOLICS, US.

But beginning at 2020-02-04 17:56:12, the same prefix (138.204.240.0/24) was also announced by ASN 4.

This was detected by 10 BGPMon peers.

Expected
Start time: 2020-02-04 17:56:12 UTC
Expected prefix: 138.204.240.0/24
Expected ASN: 5 (SYMBOLICS, US)
Event Details
Detected advertisement: 138.204.240.0/24
Detected Origin ASN 4 (ISI-AS, US)
Detected AS Path 28140 13786 28663 263444 263124 263124 263124 263913 4
Detected by number of BGPMon peers: 10

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