Possible BGP hijack

Beginning at 2019-07-26 11:33:09 UTC, we detected a possible BGP hijack.

Prefix 200.91.49.0/24, is normally announced by AS28023 COOPERATIVA DE OBRAS, SERV. PUBL. Y SOCIALES DE HERNANDO LTDA., AR.

But beginning at 2019-07-26 11:33:09, the same prefix (200.91.49.0/24) was also announced by ASN 45102.

This was detected by 12 BGPMon peers.

Expected
Start time: 2019-07-26 11:33:09 UTC
Expected prefix: 200.91.49.0/24
Expected ASN: 28023 (COOPERATIVA DE OBRAS, SERV. PUBL. Y SOCIALES DE HERNANDO LTDA., AR)
Event Details
Detected advertisement: 200.91.49.0/24
Detected Origin ASN 45102 (CNNIC-ALIBABA-US-NET-AP Alibaba (US) Technology Co., Ltd., CN)
Detected AS Path 49673 12389 3491 58453 45102
Detected by number of BGPMon peers: 12

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