Microsoft Corporation - MAC Prefix CCB0B3 (MA-L)

What this means

The IEEE assigned the MA-L block CCB0B3 to Microsoft Corporation. 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 CC:B0:B3, it is Microsoft Corporation hardware.

Frequently Asked Questions

Who owns MAC prefix CCB0B3?

CCB0B3 is registered to Microsoft Corporation 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 Corporation's block covers 16,777,216 addresses.

What devices use CCB0B3?

Any network device with a MAC address starting CC:B0:B3 was manufactured by or for Microsoft Corporation.

Other Microsoft Corporation prefixes

Microsoft Corporation holds 107 registered blocks in total.

OUI prefix	CCB0B3
Vendor	Microsoft Corporation
Registry	MA-L (24-bit, large block)
Block size	16,777,216 addresses
Country	US
Other blocks by this vendor	107 total
Example MAC	CC:B0:B3:00:00:00