COGENT COMPUTER SYSTEMS, INC.

Any device whose MAC address begins with 00:30:23 has a network interface built by COGENT COMPUTER SYSTEMS, 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

00:30:23

Organization

COGENT COMPUTER SYSTEMS, INC.

Address

10 RIVER ROAD - STE. #205 UXBRIDGE MA US 01569

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.