Who owns MAC prefix 00307D?

00307D is registered to GRE AMERICA, INC. in the IEEE MA-L registry.

What devices use 00307D?

Any network device with a MAC address starting 00:30:7D was manufactured by or for GRE AMERICA, INC..

MA-L · OUI prefix

GRE AMERICA, INC.

Any MAC address starting 00:30:7D is registered to GRE AMERICA, INC. in US.

OUI prefix	00307D
Vendor	GRE AMERICA, INC.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:30:7D:00:00:00

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.

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