Possible BGP hijack

Beginning at 2020-09-29 02:13:35 UTC, we detected a possible BGP hijack.

Prefix 200.1.143.0/24, is normally announced by AS21753 Unknown.

But beginning at 2020-09-29 02:13:35, the same prefix (200.1.143.0/24) was also announced by ASN 203.

This was detected by 141 BGPMon peers.

Expected
Start time: 2020-09-29 02:13:35 UTC
Expected prefix: 200.1.143.0/24
Expected ASN: 21753 (Unknown)
Event Details
Detected advertisement: 200.1.143.0/24
Detected Origin ASN 203 (CENTURYLINK-LEGACY-LVLT-203, US)
Detected AS Path 18356 9931 4651 3356 203
Detected by number of BGPMon peers: 141

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