GridCentric Inc.

Any device whose MAC address begins with 28:48:46 has a network interface built by GridCentric 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

28:48:46

Organization

GridCentric Inc.

Address

350 Bloor St. E Toronto Ontario CA M4W 0A1

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.