IEEE I&M Society TC9

Any device whose MAC address begins with 00:1B:19 has a network interface built by IEEE I&M Society TC9. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:1B:19

Organization

IEEE I&M Society TC9

Address

100 Bureau Dr., Mail Stop 8220 Gaithersburg MD US 20899-8220

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.