Possible BGP hijack

Beginning at 2019-12-21 05:09:51 UTC, we detected a possible BGP hijack.

Prefix 177.136.12.0/24, is normally announced by AS52871 TASCOM TELECOMUNICAÇÕES LTDA, BR.

But beginning at 2019-12-21 05:09:51, the same prefix (177.136.12.0/24) was also announced by ASN 51964.

This was detected by 6 BGPMon peers.

Expected
Start time: 2019-12-21 05:09:51 UTC
Expected prefix: 177.136.12.0/24
Expected ASN: 52871 (TASCOM TELECOMUNICAÇÕES LTDA, BR)
Event Details
Detected advertisement: 177.136.12.0/24
Detected Origin ASN 51964 (ORANGE-BUSINESS-SERVICES-IPSN-ASN, FR)
Detected AS Path 63956 3491 58453 4862 51964
Detected by number of BGPMon peers: 6

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