3COM

Any device whose MAC address begins with 00:0A:5E 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

00:0A:5E

Organization

3COM

Address

5400 Bayfront Plaza Santa Clara CA US 95052-8145

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.