Explode a list of netmasks

explode.rb

#!/usr/bin/env ruby

require 'netaddr'

File.open("networks.txt").each_line do |line|
  line.chomp!

  puts "### #{line} ###"
  NetAddr::CIDR.create(line).enumerate.each do |ip|
    puts "#{ip}"
  end
end

Gemfile

source 'https://rubygems.org'

gem 'netaddr'

networks.txt

10.0.0.0/23
192.168.0.4/16