Siemens Network Convergence LLC

Any device whose MAC address begins with 00:90:40 has a network interface built by Siemens Network Convergence LLC. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:90:40

Organization

Siemens Network Convergence LLC

Address

Ten Technology Park Drive Westford MA US 01886-3146

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.