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.
Frequently Asked Questions
Who owns MAC prefix 003073?
003073 is registered to International Microsystems, In in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. International Microsystems, In's block covers 16,777,216 addresses.
What devices use 003073?
Any network device with a MAC address starting 00:30:73 was manufactured by or for International Microsystems, In.