Sentinel Wireless Inc.

Any device whose MAC address begins with 00:0C:39 has a network interface built by Sentinel Wireless Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:0C:39

Organization

Sentinel Wireless Inc.

Address

439 S. Union St. South Lawrence MA US 01843

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.