Microsoft Corporation

Any device whose MAC address begins with 0C:1B:7B has a network interface built by Microsoft Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

0C:1B:7B

Organization

Microsoft Corporation

Address

One Microsoft Way REDMOND WA US 98052

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.