3COM

Any device whose MAC address begins with 00:26:54 has a network interface built by 3COM. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:26:54

Organization

3COM

Address

5353 Betsy Ross Drive Santa Clara US 95054-1162

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.