Cisco Systems, Inc

Any device whose MAC address begins with 4C:EC:0F has a network interface built by Cisco 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

4C:EC:0F

Organization

Cisco Systems, Inc

Address

80 West Tasman Drive San Jose CA US 94568

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.