Possible BGP hijack

Beginning at 2023-12-23 04:32:44 UTC, we detected a possible BGP hijack.

Prefix 177.8.71.0/24, is normally announced by AS26616 UBMEX DATA CENTER E TELECOMUNICACOES LTDA, BR.

But beginning at 2023-12-23 04:32:44, the same prefix (177.8.71.0/24) was also announced by ASN 273663.

This was detected by 14 BGPMon peers.

Expected
Start time: 2023-12-23 04:32:44 UTC
Expected prefix: 177.8.71.0/24
Expected ASN: 26616 (UBMEX DATA CENTER E TELECOMUNICACOES LTDA, BR)
Event Details
Detected advertisement: 177.8.71.0/24
Detected Origin ASN 273663 ()
Detected AS Path 63956 3491 2914 13786 52772 52772 52772 52772 273663
Detected by number of BGPMon peers: 14

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