Altice Labs

Any device whose MAC address begins with 58:FC:20 has a network interface built by Altice Labs. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

58:FC:20

Organization

Altice Labs

Address

NIF 504705610, Rua Eng. José Ferreira Pinto Basto Aveiro PT 3810-106

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.