SHINANO E and E Co.Ltd.

Any device whose MAC address begins with EC:B5:41 has a network interface built by SHINANO E and E 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

EC:B5:41

Organization

SHINANO E and E Co.Ltd.

Address

5511-6 Wada Matsumoto City Nagano JP 390-1242

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.