Possible BGP hijack

Beginning at 2021-11-09 20:56:29, we detected a possible BGP hijack.

Prefix 78.148.0.0/15, Normally announced by AS13285 OPALTELECOM-AS TalkTalk Communications Limited, GB

Starting at 2021-11-09 20:56:29, a more specific route (78.148.4.0/22) was announced by ASN 7018.

This was detected by 52 BGPMon peers.

Expected
Start time: 2021-11-09 20:56:29 UTC
Expected prefix: 78.148.0.0/15
Expected ASN: 13285 (OPALTELECOM-AS TalkTalk Communications Limited, GB)
Event Details
Detected advertisement: 78.148.4.0/22
Detected Origin ASN 7018 (ATT-INTERNET4, US)
Detected AS Path 8399 8218 6461 7018
Detected by number of BGPMon peers: 52

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