Possible BGP hijack

Beginning at 2019-08-24 03:11:01, we detected a possible BGP hijack.

Prefix 199.105.0.0/16, Normally announced by AS7018 ATT-INTERNET4 - AT&T Services, Inc., US

Starting at 2019-08-24 03:11:01, a more specific route (199.105.176.0/21) was announced by ASN 15290.

This was detected by 147 BGPMon peers.

Expected
Start time: 2019-08-24 03:11:01 UTC
Expected prefix: 199.105.0.0/16
Expected ASN: 7018 (ATT-INTERNET4 - AT&T Services, Inc., US)
Event Details
Detected advertisement: 199.105.176.0/21
Detected Origin ASN 15290 (ALLST-15290 - Allstream Corp., CA)
Detected AS Path 13335 3257 6461 15290 15290 15290 15290 15290
Detected by number of BGPMon peers: 147

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