PLANEX COMMUNICATIONS INC.

Any device whose MAC address begins with 44:DC:91 has a network interface built by PLANEX COMMUNICATIONS 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:DC:91

Organization

PLANEX COMMUNICATIONS INC.

Address

2F F-NISSAY Ebisu Bldg 3-16-3 Higashi, Shibuya-ku Tokyo JP 150-0011

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.