Possible BGP hijack

Beginning at 2020-05-31 20:00:36 UTC, we detected a possible BGP hijack.

Prefix, is normally announced by AS4837 CHINA169-BACKBONE CHINA UNICOM China169 Backbone, CN.

But beginning at 2020-05-31 20:00:36, the same prefix ( was also announced by ASN 53142.

This was detected by 5 BGPMon peers.

Start time: 2020-05-31 20:00:36 UTC
Expected prefix:
Expected ASN: 4837 (CHINA169-BACKBONE CHINA UNICOM China169 Backbone, CN)
Event Details
Detected advertisement:
Detected Origin ASN 53142 (Friburgo Online LTDA ME, BR)
Detected AS Path 53137 25933 53142
Detected by number of BGPMon peers: 5

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