Every connected device around the world comes with a unique Media Access Control address, or a   MAC address.

A common task a network administrator may come across is being able to identify a network device's manufacturer when given only a MAC address.



Task

Interface with one (or numerous) APIs that exist on the internet and retrieve the device manufacturer based on a supplied MAC address.

A MAC address that does not return a valid result should return the String "N/A".   An error related to the network connectivity or the API should return a null result.

Many implementations on this page use http://api.macvendors.com/ which, as of 19th September 2021, is throttling requests. After only 2 calls, the following response is returned for all subsequent requests. If you are planning to use the same provider or going to run the examples on this page, consider building in a delay between two calls.

{"errors":{"detail":"Too Many Requests","message":"Please slow down your requests or upgrade your plan at https://macvendors.com"}}

require 'net/http'
 
arr = ['88:53:2E:67:07:BE', 'FC:FB:FB:01:FA:21', 'D4:F4:6F:C9:EF:8D', '23:45:67']
 
arr.each do |addr|
  vendor = Net::HTTP.get('api.macvendors.com', "/#{addr}/") rescue nil
  puts "#{addr}  #{vendor}" 
end