Network Systems Group, Ltd. (NSG)

Any device whose MAC address begins with 00:09:56 has a network interface built by Network Systems Group, Ltd. (NSG). This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:09:56

Organization

Network Systems Group, Ltd. (NSG)

Address

39 Kirpichnaya St., Suite 1302 Moscow RU 105187

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.