Who owns MAC prefix 1C721D?

1C721D is registered to Dell Inc. in the IEEE MA-L registry.

What devices use 1C721D?

Any network device with a MAC address starting 1C:72:1D was manufactured by or for Dell Inc..

MA-L · OUI prefix

Dell Inc.

Any MAC address starting 1C:72:1D is registered to Dell Inc. in US.

OUI prefix	1C721D
Vendor	Dell Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	1C:72:1D:00:00:00

What this means

The IEEE assigned the MA-L block 1C721D to Dell Inc.. 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 1C:72:1D, it is Dell Inc. hardware.

Other Dell Inc. prefixes

Dell Inc. holds 184 registered blocks in total.

00065B 000874 000BDB 000D56 000F1F 004E01 001143 00123F 001372 001422 0015C5 00188B all 184 »

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