Possible BGP hijack

Beginning at 2023-07-29 19:11:51 UTC, we detected a possible BGP hijack.

Prefix 138.204.188.0/23, is normally announced by AS263918 WS TELECOMUNICACOES LTDA EPP, BR.

But beginning at 2023-07-29 19:11:51, the same prefix (138.204.188.0/23) was also announced by ASN 60503.

This was detected by 4 BGPMon peers.

Expected
Start time: 2023-07-29 19:11:51 UTC
Expected prefix: 138.204.188.0/23
Expected ASN: 263918 (WS TELECOMUNICACOES LTDA EPP, BR)
Event Details
Detected advertisement: 138.204.188.0/23
Detected Origin ASN 60503 (FNXTEC, BR)
Detected AS Path 20205 6939 60503 60503
Detected by number of BGPMon peers: 4

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