Who owns MAC prefix 003073?

003073 is registered to International Microsystems, In in the IEEE MA-L registry.

What devices use 003073?

Any network device with a MAC address starting 00:30:73 was manufactured by or for International Microsystems, In.

MA-L · OUI prefix

International Microsystems, In

Any MAC address starting 00:30:73 is registered to International Microsystems, In in US.

OUI prefix	003073
Vendor	International Microsystems, In
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:30:73:00:00:00

What this means

The IEEE assigned the MA-L block 003073 to International Microsystems, In. 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 00:30:73, it is International Microsystems, In hardware.

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