Possible BGP hijack

Beginning at 2020-06-20 12:41:25 UTC, we detected a possible BGP hijack.

Prefix 158.51.101.0/24, is normally announced by AS202 CENTURYLINK-LEGACY-LVLT-202, US.

But beginning at 2020-06-20 12:41:25, the same prefix (158.51.101.0/24) was also announced by ASN 17231.

This was detected by 152 BGPMon peers.

Expected
Start time: 2020-06-20 12:41:25 UTC
Expected prefix: 158.51.101.0/24
Expected ASN: 202 (CENTURYLINK-LEGACY-LVLT-202, US)
Event Details
Detected advertisement: 158.51.101.0/24
Detected Origin ASN 17231 (ATT-CERFNET-BLOCK, US)
Detected AS Path 53131 3549 3257 20473 20473 397881 17231
Detected by number of BGPMon peers: 152

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