MITSUMI ELECTRIC CO.,LTD.

Any device whose MAC address begins with 78:61:7C has a network interface built by MITSUMI ELECTRIC CO.,LTD.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

78:61:7C

Organization

MITSUMI ELECTRIC CO.,LTD.

Address

2-11-2, Tsurumaki Tama-shi Tokyo JP 206-8567

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.