Who owns MAC prefix 001621?

001621 is registered to Colorado Vnet in the IEEE MA-L registry.

What devices use 001621?

Any network device with a MAC address starting 00:16:21 was manufactured by or for Colorado Vnet.

MA-L · OUI prefix

Colorado Vnet

Any MAC address starting 00:16:21 is registered to Colorado Vnet in US.

OUI prefix	001621
Vendor	Colorado Vnet
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:16:21:00:00:00

What this means

The IEEE assigned the MA-L block 001621 to Colorado Vnet. 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 00:16:21, it is Colorado Vnet hardware.

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