Swissvoice Ltd.

Any device whose MAC address begins with 00:05:90 has a network interface built by Swissvoice Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:05:90

Organization

Swissvoice Ltd.

Address

Ziegelmattstrasse 1 CH

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.