Who owns MAC prefix C4A559?

C4A559 is registered to IEEE Registration Authority in the IEEE MA-L registry.

What devices use C4A559?

Any network device with a MAC address starting C4:A5:59 was manufactured by or for IEEE Registration Authority.

MA-L · OUI prefix

IEEE Registration Authority

Any MAC address starting C4:A5:59 is registered to IEEE Registration Authority in US.

OUI prefix	C4A559
Vendor	IEEE Registration Authority
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	C4:A5:59:00:00:00

What this means

The IEEE assigned the MA-L block C4A559 to IEEE Registration Authority. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting C4:A5:59, it is IEEE Registration Authority hardware.

Other IEEE Registration Authority prefixes

IEEE Registration Authority holds 435 registered blocks in total.

001BC5 0050C2 0055DA 006967 006A5E 008DF4 041119 04585D 04714B 04A16F 04C3E6 04C98B all 435 »

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