Microchip Technology Inc.

Any device whose MAC address begins with 04:91:62 has a network interface built by Microchip Technology 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

04:91:62

Organization

Microchip Technology Inc.

Address

2355 W. Chandler Blvd. Chandler AZ US 85224

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.