Finding all MAC addresses in a Network and finding the vendor

I am currently on a task wherein I have to identify two VoIP phones connected on our LAN and have to configure them to work as part of our 3CX phone network. The starting part of course is to find the MAC addresses of the two IP Phones. So after a few minutes of searching I became aware of Colasoft MAC Scanner a relatively good tool which created a list of all machines on our LAN listing them by their IP address, MAC address and domain name. From the list of machines I saw two machines with identical OUIs (Organization Unique Identifier), aka first 6 hexadecimal numerals of the MAC address. To confirm the finding I searched for the vendor licensed to manufacture with this OUI at

http://standards.ieee.org/develop/regauth/oui/public.html

And voila!! These MAC Addresses were assigned to a VoIP Phone manufacturer!

So the basic premise of the post is if ever you get a MAC Address and you find the need to determine the manufacturer of the device, use the above link.