Critical

Critical is a registered as a hardware vendor producing devices with MAC addresses according to the below table.

MAC Prefix	Brand Name	Vendor Name
C4:FF:BC:70:00:00/28	Critical	Critical Link
00:90:9E	Critical	Critical IO, LLC
70:B3:D5:F1:D0:00/36	Critical	Critical Link LLC
70:B3:D5:EF:90:00/36	Critical	Critical Link LLC
70:B3:D5:E5:E0:00/36	Critical	Critical Link LLC
70:B3:D5:D5:C0:00/36	Critical	Critical Link LLC
70:B3:D5:B5:10:00/36	Critical	Critical Link LLC
70:B3:D5:AF:90:00/36	Critical	Critical Link LLC
70:B3:D5:76:10:00/36	Critical	Critical Link LLC
70:B3:D5:42:A0:00/36	Critical	Critical Link LLC
40:D8:55:17:C0:00/36	Critical	Critical Link LLC
00:50:C2:FC:60:00/36	Critical	Critical Link LLC
00:50:C2:E6:70:00/36	Critical	Critical Link LLC
00:50:C2:8F:40:00/36	Critical	Critical Link LLC
00:50:C2:49:D0:00/36	Critical	Critical Link LLC

MAC Prefix	Vendor / Company	Address	Country

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From 00 to FF, search any MAC address using MAC.lc –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