JAG Jakob AG

Any device whose MAC address begins with 28:ED:58 has a network interface built by JAG Jakob AG. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

28:ED:58

Organization

JAG Jakob AG

Address

Industriestrasse 20 BRUEGG BE CH 2555

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.