Possible BGP hijack

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

Prefix, is normally announced by AS21753 Unknown.

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

This was detected by 141 BGPMon peers.

Start time: 2020-09-29 02:13:35 UTC
Expected prefix:
Expected ASN: 21753 (Unknown)
Event Details
Detected advertisement:
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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