EMS Aviation, Inc.

Any device whose MAC address begins with 00:80:33 has a network interface built by EMS Aviation, 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

00:80:33

Organization

EMS Aviation, Inc.

Address

121 WHITTENDALE DRIVE MOORESTOWN NJ US 08057

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.