Possible BGP hijack

Beginning at 2021-03-01 19:28:50 UTC, we detected a possible BGP hijack.

Prefix 2001:500:856e::/48, is normally announced by AS10515 Unknown.

But beginning at 2021-03-01 19:28:50, the same prefix (2001:500:856e::/48) was also announced by ASN 269684.

This was detected by 17 BGPMon peers.

Expected
Start time: 2021-03-01 19:28:50 UTC
Expected prefix: 2001:500:856e::/48
Expected ASN: 10515 (Unknown)
Event Details
Detected advertisement: 2001:500:856e::/48
Detected Origin ASN 269684 (LANFIBRA TELECOMUNICACOES - EIRELI, BR)
Detected AS Path 57 6939 266539 269684
Detected by number of BGPMon peers: 17

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