Who owns MAC prefix 70B3D5846?

70B3D5846 is registered to National Time & Signal Corp. in the IEEE MA-S registry.

What devices use 70B3D5846?

Any network device with a MAC address starting 70:B3:D5:84:6 was manufactured by or for National Time & Signal Corp..

MA-S · OUI prefix

National Time & Signal Corp.

Any MAC address starting 70:B3:D5:84:6 is registered to National Time & Signal Corp. in US.

OUI prefix	70B3D5846
Vendor	National Time & Signal Corp.
Registry	MA-S (36-bit, small block)
Country	US
Example MAC	70:B3:D5:84:6:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5846 to National Time & Signal Corp.. 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:D5:84:6, it is National Time & Signal Corp. hardware.

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