Construcciones y Auxiliar de Ferrocarriles, S.A.

Any device whose MAC address begins with 00:1F:39 has a network interface built by Construcciones y Auxiliar de Ferrocarriles, S.A.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:1F:39

Organization

Construcciones y Auxiliar de Ferrocarriles, S.A.

Address

C/ J.M. Iturrioz, 26 Beasain Guipúzcoa ES E-20200

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.