RackTop Systems Inc.

Any device whose MAC address begins with C4:40:44 has a network interface built by RackTop 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

C4:40:44

Organization

RackTop Systems Inc.

Address

11840 W Market Pl Suite K Fulton MD US 20759

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.