Microsoft - MAC Prefix 3059B7 (MA-L)

What this means

The IEEE assigned the MA-L block 3059B7 to Microsoft. 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 30:59:B7, it is Microsoft hardware.

Frequently Asked Questions

Who owns MAC prefix 3059B7?

3059B7 is registered to Microsoft 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. Microsoft's block covers 16,777,216 addresses.

What devices use 3059B7?

Any network device with a MAC address starting 30:59:B7 was manufactured by or for Microsoft.

Other Microsoft prefixes

Microsoft holds 9 registered blocks in total.

OUI prefix	3059B7
Vendor	Microsoft
Registry	MA-L (24-bit, large block)
Block size	16,777,216 addresses
Country	US
Other blocks by this vendor	9 total
Example MAC	30:59:B7:00:00:00