Criticare Systems, Inc

Any device whose MAC address begins with 44:59:9F has a network interface built by Criticare 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

44:59:9F

Organization

Criticare Systems, Inc

Address

20925 Crossroads Circle Waukasha WI US 53186

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.