COMTECH RESEARCH INC.

Any device whose MAC address begins with 00:20:B1 has a network interface built by COMTECH RESEARCH INC.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:B1

Organization

COMTECH RESEARCH INC.

Address

24271 TAHOE LAGUNA NIGUEL CA US 92656

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.