Drew Technologies, Inc.

Any device whose MAC address begins with 00:04:D1 has a network interface built by Drew Technologies, 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

00:04:D1

Organization

Drew Technologies, Inc.

Address

3915 Research Park Dr Ann Arbor MI US 48108

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.