Who owns MAC prefix C4CB76?

C4CB76 is registered to Microsoft Corporation in the IEEE MA-L registry.

What devices use C4CB76?

Any network device with a MAC address starting C4:CB:76 was manufactured by or for Microsoft Corporation.

MA-L · OUI prefix

Microsoft Corporation

Any MAC address starting C4:CB:76 is registered to Microsoft Corporation in US.

OUI prefix	C4CB76
Vendor	Microsoft Corporation
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	C4:CB:76:00:00:00

What this means

The IEEE assigned the MA-L block C4CB76 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 C4:CB:76, it is Microsoft Corporation hardware.

Other Microsoft Corporation prefixes

Microsoft Corporation holds 105 registered blocks in total.

0003FF 00125A 00155D 0017FA 001DD8 002248 0025AE 042728 08357D 0C1B7B 0C3526 0C413E all 105 »

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