MCDONNELL DOUGLAS COMPUTER SYS

Any device whose MAC address begins with 00:00:B9 has a network interface built by MCDONNELL DOUGLAS COMPUTER SYS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:00:B9

Organization

MCDONNELL DOUGLAS COMPUTER SYS

Address

DIV MCDONNELL DOUGLAS INF SYS GB ENGLAND

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.