Possible BGP hijack

Beginning at 2020-08-18 19:13:37, we detected a possible BGP hijack.

Prefix 192.214.128.0/18, Normally announced by AS22423 ALTIMA-TELECOM, CA

Starting at 2020-08-18 19:13:37, a more specific route (192.214.136.0/21) was announced by ASN 3356.

This was detected by 147 BGPMon peers.

Expected
Start time: 2020-08-18 19:13:37 UTC
Expected prefix: 192.214.128.0/18
Expected ASN: 22423 (ALTIMA-TELECOM, CA)
Event Details
Detected advertisement: 192.214.136.0/21
Detected Origin ASN 3356 (LEVEL3, US)
Detected AS Path 14613 174 3356
Detected by number of BGPMon peers: 147

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