What this means
The IEEE assigned the MA-L block 00307D to GRE AMERICA, 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 00:30:7D, it is GRE AMERICA, INC. hardware.
Frequently Asked Questions
Who owns MAC prefix 00307D?
00307D is registered to GRE AMERICA, INC. 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. GRE AMERICA, INC.'s block covers 16,777,216 addresses.
What devices use 00307D?
Any network device with a MAC address starting 00:30:7D was manufactured by or for GRE AMERICA, INC..