Possible BGP hijack

Beginning at 2021-02-27 02:06:26 UTC, we detected a possible BGP hijack.

Prefix 2a01:4640:c800::/40, is normally announced by AS9042 SIX Zuerich, Switzerland, CH.

But beginning at 2021-02-27 02:06:26, the same prefix (2a01:4640:c800::/40) was also announced by ASN 269684.

This was detected by 2 BGPMon peers.

Expected
Start time: 2021-02-27 02:06:26 UTC
Expected prefix: 2a01:4640:c800::/40
Expected ASN: 9042 (SIX Zuerich, Switzerland, CH)
Event Details
Detected advertisement: 2a01:4640:c800::/40
Detected Origin ASN 269684 (LANFIBRA TELECOMUNICACOES - EIRELI, BR)
Detected AS Path 52694 266539 269684
Detected by number of BGPMon peers: 2

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