Later uploaded it in CSV format to a public GitHub repo here, from where it could be downloaded to any machine.

I scoured and sanitized the file to reduce the size by 3 times so that it’s quicker in downloads and Lookups. Once you have the information, filter out all unnecessary things and store them in a CSV or JSON format, so that it can be easily uploaded/downloaded from a Publically accessible Github repository.After some searching on their website, I found MACAddress OUI (Organisationally Unique Identifier) file with Vendor-Prefix mappings in a CSV format and I downloaded it. Ok, during my graduation days we read somewhere that MAC prefixes are registered at IEEE (Institute of Electrical and Electronics Engineers), So how about checking their website first. Now I want the list of Vendors registered for every such Prefix, but how to get it?.So if my MAC Address is ’48-4D-7E-E6-A8-47′ then the first 6 digits (Prefix) can be easily extracted like

MAC addresses are stored/burned on the device during the manufacturing process and are designed to not to be modified.The first 6 digits (24 bits) of a MAC Address is called as ‘Prefix’, which are Manufacturers bits registered in IEEE database unique to a vendor, somewhat like in below format – and next 6 digits are Device unique identifiers, following are 3 formats used to represent a MAC address –.

Yesterday while troubleshooting a network issue, I realized that if I can know the vendor of a MAC Address, then I could understand if it’s a Dell Router, a VMWare virtual NIC or a Dell server then maybe it will make life a bit easy, like in the following example. Introduction to ‘Get MAC Vendor using PowerShell’:

Mac address vendor codes lookup