Possible BGP hijack

Beginning at 2021-11-07 03:31:47 UTC, we detected a possible BGP hijack.

Prefix 173.27.191.0/24, is normally announced by AS30036 MEDIACOM-ENTERPRISE-BUSINESS, US.

But beginning at 2021-11-07 03:31:47, the same prefix (173.27.191.0/24) was also announced by ASN 138195.

This was detected by 8 BGPMon peers.

Expected
Start time: 2021-11-07 03:31:47 UTC
Expected prefix: 173.27.191.0/24
Expected ASN: 30036 (MEDIACOM-ENTERPRISE-BUSINESS, US)
Event Details
Detected advertisement: 173.27.191.0/24
Detected Origin ASN 138195 (MOACKCOLTD-AS-AP MOACK.Co.LTD, KR)
Detected AS Path 18356 9931 4651 3491 58453 138195
Detected by number of BGPMon peers: 8

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