Little script that you feed a list of trackers and will eliminate the duplicates that point to the same IP addresses and try to group the trackers by domain name.

trackers-resolvs.rb

require 'uri'
require 'resolv'

text = File.open("trackers.txt").read.split(/\n|(\r\n)/)
hosts = text.map{ |uri| [URI(uri).host, uri] }.to_h
resolvs = {}

hosts.each do |h, uri|
  if /\d+\.\d+\.\d+\.\d+/.match(h)
    resolvs[h] = h
  else
    begin
      ip = Resolv.getaddress h
      points = resolvs[ip]
      if points.nil? || /\d+\.\d+\.\d+\.\d+/.match(points)
        resolvs[ip] = h
      end
    rescue
      #Could not resolve address
    end
  end
end
schemes = ["udp", "http", "https"]
ips = { "udp" => [], "http" => [], "https" => [] }
groups = {}

resolvs.each do |ip, h|
  scheme = URI(hosts[h]).scheme
  if ip == h
    ips[scheme] << hosts[h]
  else
    domain = h.split(/\./)
    domain = domain.size > 2 ? domain[1] : domain[0]
    if groups[domain].nil?
      groups[domain] = { "udp" => [], "http" => [], "https" => [] }
    end
      groups[domain][scheme] << hosts[h]
  end
end

groups.each do |group, uris|
  schemes.each do |scheme|
    uris[scheme].each{ |uri| puts uri }
  end
  puts "\n"
end

schemes.each do |scheme|
  ips[scheme].each do |ip|
   puts ip
   puts "\n"
 end
end