Curtis Instruments, Inc.

Any device whose MAC address begins with 7C:01:87 has a network interface built by Curtis Instruments, 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

7C:01:87

Organization

Curtis Instruments, Inc.

Address

200 Kisco Avenue Mt Kisco NY US 10549

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.