Realm Systems, Inc.

Any device whose MAC address begins with 00:13:58 has a network interface built by Realm Systems, 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

00:13:58

Organization

Realm Systems, Inc.

Address

9350 South 535 East Sandy Utah US 84070

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.