Metropolitan Area Networks, Inc.

Any device whose MAC address begins with 00:03:5E has a network interface built by Metropolitan Area Networks, 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

00:03:5E

Organization

Metropolitan Area Networks, Inc.

Address

1299 Pennsylvania Avenue, NW Washington DC US 20004

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.