Vivox Inc

Any device whose MAC address begins with 00:19:81 has a network interface built by Vivox 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

00:19:81

Organization

Vivox Inc

Address

40 Speen Street Framingham MA US 01701

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.