Who owns MAC prefix 00100A?

00100A is registered to WILLIAMS COMMUNICATIONS GROUP in the IEEE MA-L registry.

What devices use 00100A?

Any network device with a MAC address starting 00:10:0A was manufactured by or for WILLIAMS COMMUNICATIONS GROUP.

MA-L · OUI prefix

WILLIAMS COMMUNICATIONS GROUP

Any MAC address starting 00:10:0A is registered to WILLIAMS COMMUNICATIONS GROUP in US.

OUI prefix	00100A
Vendor	WILLIAMS COMMUNICATIONS GROUP
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:10:0A:00:00:00

What this means

The IEEE assigned the MA-L block 00100A to WILLIAMS COMMUNICATIONS GROUP. 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 00:10:0A, it is WILLIAMS COMMUNICATIONS GROUP hardware.

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