Multi-Region DNS Lookup Utility

mdig.rb

# Multi-Region DNS NameServer Propogation Check
#
# Uses the dns-lg.com API to retrieve the NS records for a zone (domain name)
# at 19 (more or less) different locations globally. Use this to monitor the 
# propogation of nameserver changes at your registrar. 
# 
# Note: There is no such thing as a guarantee when it comes to whether your
# new nameservers have propogated fully or not. Rule of thumb is three days
# but often it is much faster and this check can help you weigh the risks.

require 'net/http'
require 'json'

if ARGV.length != 1
  puts "Usage: ruby mdig.rb [domain name]"
  puts "Example: ruby mdig.rb example.com"
  exit
end

nodes = JSON.parse(Net::HTTP.get("www.dns-lg.com", "/nodes.json"))["nodes"]
nodes.each do |node|
  puts "#{node["country"]} – #{node["name"]}"
  response = JSON.parse(Net::HTTP.get("www.dns-lg.com", "/#{node["name"]}/#{ARGV[0]}/ns"))
  records = response["answer"]
  records.each do |record|
    puts "  #{record["ttl"]} #{record["type"]} #{record["rdata"]}"
  end
end