Transcon Electronic Systems, spol. s r. o.

Any device whose MAC address begins with 00:21:16 has a network interface built by Transcon Electronic Systems, spol. s r. o.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:16

Organization

Transcon Electronic Systems, spol. s r. o.

Address

Kvapilova 2133 Frydek-Mistek CZ 73802

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.