Who owns MAC prefix 002157?

002157 is registered to National Datacast, Inc. in the IEEE MA-L registry.

What devices use 002157?

Any network device with a MAC address starting 00:21:57 was manufactured by or for National Datacast, Inc..

MA-L · OUI prefix

National Datacast, Inc.

Any MAC address starting 00:21:57 is registered to National Datacast, Inc. in US.

OUI prefix	002157
Vendor	National Datacast, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:21:57:00:00:00

What this means

The IEEE assigned the MA-L block 002157 to National Datacast, 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 00:21:57, it is National Datacast, Inc. hardware.

Look up another MAC