Possible BGP hijack

Beginning at 2021-02-27 02:06:27 UTC, we detected a possible BGP hijack.

Prefix 2600:140b:1000::/48, is normally announced by AS17511 OPTAGE OPTAGE Inc., JP.

But beginning at 2021-02-27 02:06:27, the same prefix (2600:140b:1000::/48) was also announced by ASN 269684.

This was detected by 3 BGPMon peers.

Expected
Start time: 2021-02-27 02:06:27 UTC
Expected prefix: 2600:140b:1000::/48
Expected ASN: 17511 (OPTAGE OPTAGE Inc., JP)
Event Details
Detected advertisement: 2600:140b:1000::/48
Detected Origin ASN 269684 (LANFIBRA TELECOMUNICACOES - EIRELI, BR)
Detected AS Path 52694 266539 269684
Detected by number of BGPMon peers: 3

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