arin_query.rb

#!/usr/bin/env ruby

require 'json'
require 'open-uri'

module ARIN
  class Search
    def initialize uri='http://whois.arin.net/rest/'
      @uri = URI.parse(uri)
    end
    
    def get resource
      JSON.parse(open(@uri.merge(URI.encode(resource)),'accept'=>'application/json').read)
    end

    def lookup query
      base_uri = URI.parse('http://whois.arin.net/rest/')
      orgs = get("orgs;name=#{query}*")['orgs']['orgRef']
      nets = orgs.inject({}) do |hash,org|
        begin
          net_ref = get("org/#{org['@handle']}/nets")['nets']['netRef']
          hash[org['@name']] ||= []
          if net_ref.is_a?(Hash)
            hash[org['@name']] << [net_ref['@startAddress'],net_ref['@endAddress']]
          else
            hash[org['@name']] += net_ref.collect { |n| [n['@startAddress'],n['@endAddress']] }
          end
        rescue OpenURI::HTTPError
        end
        hash
      end
    end
  end
end

client = ARIN::Search.new
puts JSON.pretty_generate(client.lookup(ARGV.join(' ')))

example.txt

$ ./arin_query.rb Boston Public
{
  "BOSTON PUBLIC HEALTH COMMISSION": [
    [
      "65.169.210.128",
      "65.169.210.255"
    ],
    [
      "63.165.233.32",
      "63.165.233.63"
    ],
    [
      "209.117.36.0",
      "209.117.37.255"
    ]
  ],
  "Boston Public Library": [
    [
      "204.167.88.0",
      "204.167.88.255"
    ],
    [
      "192.80.65.0",
      "192.80.65.255"
    ]
  ],
  "Boston Public Schools": [
    [
      "216.163.208.0",
      "216.163.223.255"
    ]
  ]
}