Using this page you can search for an OID if you know the manufacturer, or for a manufacturer if you know its OID.
This way you can find who made your network adapter, given the mac address and vice-versa.

Type the OID (first six hex digits of your mac address) you're looking for, using no space or other symbols, i.e. 000001

Type the manufacturer you're looking for, or just a part of its name, i.e. xerox corporation or intel

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Mac Makeup, the free mac address spoofing tool for windows
Also jump to the portal if you think this database is incomplete (I know it is) and want to send me more info