RyCo Electronic Systems Limited

Any device whose MAC address begins with 00:13:B8 has a network interface built by RyCo Electronic Systems Limited. 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:B8

Organization

RyCo Electronic Systems Limited

Address

Unit E, Cartel Business Estate Harlow Essex GB CM20 2TT

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.