NORTHERN TELECOM/NETWORK

Any device whose MAC address begins with 00:20:1B has a network interface built by NORTHERN TELECOM/NETWORK. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:20:1B

Organization

NORTHERN TELECOM/NETWORK

Address

SYSTEMS CORPORATION CANADA CA K8N 5B7

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.