DIGITAL SOLUTIONS LTD

Any device whose MAC address begins with 00:21:B1 has a network interface built by DIGITAL SOLUTIONS LTD. 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:B1

Organization

DIGITAL SOLUTIONS LTD

Address

Tsarigradsko Shose 7km BLVD Sofia Sofia BG 1784

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.