Cumulus Networks, inc

Any device whose MAC address begins with 44:38:39 has a network interface built by Cumulus Networks, 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

44:38:39

Organization

Cumulus Networks, inc

Address

650 Castro Street, suite 120-245 Mountain View CA US 94041

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.