Who owns MAC prefix 70B3D514B?

70B3D514B is registered to C21 Systems Ltd in the IEEE MA-S registry.

What devices use 70B3D514B?

Any network device with a MAC address starting 70:B3:D5:14:B was manufactured by or for C21 Systems Ltd.

MA-S · OUI prefix

C21 Systems Ltd

Any MAC address starting 70:B3:D5:14:B is registered to C21 Systems Ltd.

OUI prefix	70B3D514B
Vendor	C21 Systems Ltd
Registry	MA-S (36-bit, small block)
Example MAC	70:B3:D5:14:B:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D514B to C21 Systems Ltd. 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 70:B3:D5:14:B, it is C21 Systems Ltd hardware.

Other C21 Systems Ltd prefixes

C21 Systems Ltd holds 2 registered blocks in total.

70B3D57E4

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