A Beltrónica-Companhia de Comunicações, Lda

Any device whose MAC address begins with 00:15:34 has a network interface built by A Beltrónica-Companhia de Comunicações, Lda. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:15:34

Organization

A Beltrónica-Companhia de Comunicações, Lda

Address

Rua Dr. José Baptista de Sousa, 27 Lisbon PT 1549-002 Lis

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.