QTelNet, Inc.

Any device whose MAC address begins with 00:30:57 has a network interface built by QTelNet, 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

00:30:57

Organization

QTelNet, Inc.

Address

400 - 3115 12th Street NE Calgary Alberta CA T2E 7J2

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.