A Media Access Control address, MAC address, is a unique identifier assigned to network interfaces for communications on the physical network segment. More informations in Wikipedia

This tool will help you to find the vendor name of an Ethernet card by entering the Mac Address of the card. The following formats are accepted for Mac Address in the below form:

Format
00:22:19:d5:02:55
00-22-19-d5-02-55
002219d50255
Mac Address: