STMicrolectronics International NV

Any device whose MAC address begins with 50:0F:59 has a network interface built by STMicrolectronics International NV. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

50:0F:59

Organization

STMicrolectronics International NV

Address

39, Chemin du Champ-des-Filles Geneva, Plan-les-Quates CH 1228

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.