Sertel Electronics UK Ltd

Any device whose MAC address begins with 04:57:2F has a network interface built by Sertel Electronics UK 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

04:57:2F

Organization

Sertel Electronics UK Ltd

Address

Rutland House, 148 Edmund Street, Birmingham GB B3 2FD

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.