Sequel Technologies

Any device whose MAC address begins with 00:21:20 has a network interface built by Sequel Technologies. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:21:20

Organization

Sequel Technologies

Address

2951 Cleveland Ave N Roseville MN US 55113

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.