Tonalite Holding B.V.

Any device whose MAC address begins with 44:5E:F3 has a network interface built by Tonalite Holding B.V.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

44:5E:F3

Organization

Tonalite Holding B.V.

Address

Nieuw Amsterdamsestraat 40 Emmen Drenthe NL 7814 VA

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.