Telegesis

Any device whose MAC address begins with 00:21:ED has a network interface built by Telegesis. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:ED

Organization

Telegesis

Address

84 Station Road Marlow Bucks GB SL7 1NX

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.