Tutus Data AB

Any device whose MAC address begins with 00:21:F1 has a network interface built by Tutus Data AB. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:F1

Organization

Tutus Data AB

Address

Svardvagen 11 Danderyd Stockholm SE 18233

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.