Sonance

Any device whose MAC address begins with 40:11:DC has a network interface built by Sonance. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

40:11:DC

Organization

Sonance

Address

212 Avenida Fabricante San Clemente California US 92672

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.