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So I rolled my own using an Azure Trigger Function. I needed more than 1000 per day, but I also had a good idea of what the vendors were likely to be for a lot of my requests. If you are only looking up small volumes that is all good, but after that you get into subscription fee costs.
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And some like that one have an API to allow lookup too. There are a number of online lookup tools to determine who the vendor is from the MAC address. A MAC Address looks like this 60:5b:b4:f9:63:05. The first 24 bits (6 hex characters) detail the vendor / manufacturer. As you are probably aware each network device has a unique MAC Address. As part of that I needed to identify the Vendor / Manufacturer of networking equipment. Recently I started working on another side IoT Project.
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