A list of international country dialing codes extracted from Wikipedia into an HTML select. The ruby file produces this list by scraping the 'List of country calling codes' Wikipedia page.

international_country_dialing_codes.html

<select>
<option value='7840'>Abkhazia (+7 840)</option>
<option value='7940'>Abkhazia (+7 940)</option>
<option value='99544'>Abkhazia (+995 44)</option>
<option value='93'>Afghanistan (+93)</option>
<option value='355'>Albania (+355)</option>
<option value='213'>Algeria (+213)</option>
<option value='1684'>American Samoa (+1 684)</option>
<option value='857'>ANAC Satellite (+857)</option>
<option value='858'>ANAC Satellite (+858)</option>
<option value='376'>Andorra (+376)</option>
<option value='244'>Angola (+244)</option>
<option value='1264'>Anguilla (+1 264)</option>
<option value='1268'>Antigua and Barbuda (+1 268)</option>
<option value='54'>Argentina (+54)</option>
<option value='374'>Armenia (+374)</option>
<option value='297'>Aruba (+297)</option>
<option value='247'>Ascension (+247)</option>
<option value='61'>Australia (+61)</option>
<option value='672'>Australian External Territories (+672)</option>
<option value='43'>Austria (+43)</option>
<option value='994'>Azerbaijan (+994)</option>
<option value='1242'>Bahamas (+1 242)</option>
<option value='973'>Bahrain (+973)</option>
<option value='880'>Bangladesh (+880)</option>
<option value='1246'>Barbados (+1 246)</option>
<option value='1268'>Barbuda (+1 268)</option>
<option value='375'>Belarus (+375)</option>
<option value='32'>Belgium (+32)</option>
<option value='501'>Belize (+501)</option>
<option value='229'>Benin (+229)</option>
<option value='1441'>Bermuda (+1 441)</option>
<option value='975'>Bhutan (+975)</option>
<option value='591'>Bolivia (+591)</option>
<option value='387'>Bosnia and Herzegovina (+387)</option>
<option value='267'>Botswana (+267)</option>
<option value='55'>Brazil (+55)</option>
<option value='246'>British Indian Ocean Territory (+246)</option>
<option value='1284'>British Virgin Islands (+1 284)</option>
<option value='673'>Brunei (+673)</option>
<option value='359'>Bulgaria (+359)</option>
<option value='226'>Burkina Faso (+226)</option>
<option value='257'>Burundi (+257)</option>
<option value='855'>Cambodia (+855)</option>
<option value='237'>Cameroon (+237)</option>
<option value='1'>Canada (+1)</option>
<option value='238'>Cape Verde (+238)</option>
<option value='1345'>Cayman Islands (+1 345)</option>
<option value='236'>Central African Republic (+236)</option>
<option value='235'>Chad (+235)</option>
<option value='64'>Chatham Island (New Zealand) (+64)</option>
<option value='56'>Chile (+56)</option>
<option value='86'>China (+86)</option>
<option value='61'>Christmas Island (+61)</option>
<option value='61'>Cocos-Keeling Islands (+61)</option>
<option value='57'>Colombia (+57)</option>
<option value='269'>Comoros (+269)</option>
<option value='242'>Congo (+242)</option>
<option value='242'>Congo - Brazzaville (+242)</option>
<option value='243'>Congo, Dem. Rep. of (Zaire) (+243)</option>
<option value='243'>Congo - Kinshasa (+243)</option>
<option value='682'>Cook Islands (+682)</option>
<option value='506'>Costa Rica (+506)</option>
<option value='225'>Ivory Coast (+225)</option>
<option value='385'>Croatia (+385)</option>
<option value='53'>Cuba (+53)</option>
<option value='5399'>Cuba (Guantanamo Bay) (+5399)</option>
<option value='599'>Curaçao (+599)</option>
<option value='357'>Cyprus (+357)</option>
<option value='420'>Czech Republic (+420)</option>
<option value='45'>Denmark (+45)</option>
<option value='246'>Diego Garcia (+246)</option>
<option value='253'>Djibouti (+253)</option>
<option value='1767'>Dominica (+1 767)</option>
<option value='1809'>Dominican Republic (+1 809)</option>
<option value='1829'>Dominican Republic (+1 829)</option>
<option value='1849'>Dominican Republic (+1 849)</option>
<option value='670'>East Timor (+670)</option>
<option value='56'>Easter Island (+56)</option>
<option value='593'>Ecuador (+593)</option>
<option value='20'>Egypt (+20)</option>
<option value='503'>El Salvador (+503)</option>
<option value='8812'>Ellipso (Mobile Satellite service) (+8812)</option>
<option value='8813'>Ellipso (Mobile Satellite service) (+8813)</option>
<option value='88213'>EMSAT (Mobile Satellite service) (+88213)</option>
<option value='240'>Equatorial Guinea (+240)</option>
<option value='291'>Eritrea (+291)</option>
<option value='372'>Estonia (+372)</option>
<option value='251'>Ethiopia (+251)</option>
<option value='500'>Falkland Islands (+500)</option>
<option value='298'>Faroe Islands (+298)</option>
<option value='679'>Fiji (+679)</option>
<option value='358'>Finland (+358)</option>
<option value='33'>France (+33)</option>
<option value='596'>French Antilles (+596)</option>
<option value='594'>French Guiana (+594)</option>
<option value='689'>French Polynesia (+689)</option>
<option value='241'>Gabon (+241)</option>
<option value='220'>Gambia (+220)</option>
<option value='995'>Georgia (+995)</option>
<option value='49'>Germany (+49)</option>
<option value='233'>Ghana (+233)</option>
<option value='350'>Gibraltar (+350)</option>
<option value='881'>Global Mobile Satellite System (GMSS) (+881)</option>
<option value='8818'>Globalstar (Mobile Satellite Service) (+8818)</option>
<option value='8819'>Globalstar (Mobile Satellite Service) (+8819)</option>
<option value='30'>Greece (+30)</option>
<option value='299'>Greenland (+299)</option>
<option value='1473'>Grenada (+1 473)</option>
<option value='590'>Guadeloupe (+590)</option>
<option value='1671'>Guam (+1 671)</option>
<option value='502'>Guatemala (+502)</option>
<option value='224'>Guinea (+224)</option>
<option value='245'>Guinea-Bissau (+245)</option>
<option value='592'>Guyana (+592)</option>
<option value='509'>Haiti (+509)</option>
<option value='504'>Honduras (+504)</option>
<option value='852'>Hong Kong (+852)</option>
<option value='36'>Hungary (+36)</option>
<option value='354'>Iceland (+354)</option>
<option value='8810'>ICO Global (Mobile Satellite Service) (+8810)</option>
<option value='8811'>ICO Global (Mobile Satellite Service) (+8811)</option>
<option value='91'>India (+91)</option>
<option value='62'>Indonesia (+62)</option>
<option value='870'>Inmarsat SNAC (+870)</option>
<option value='800'>International Freephone Service (+800)</option>
<option value='808'>International Shared Cost Service (ISCS) (+808)</option>
<option value='98'>Iran (+98)</option>
<option value='964'>Iraq (+964)</option>
<option value='353'>Ireland (+353)</option>
<option value='8816'>Iridium (Mobile Satellite service) (+8816)</option>
<option value='8817'>Iridium (Mobile Satellite service) (+8817)</option>
<option value='972'>Israel (+972)</option>
<option value='39'>Italy (+39)</option>
<option value='1876'>Jamaica (+1 876)</option>
<option value='81'>Japan (+81)</option>
<option value='962'>Jordan (+962)</option>
<option value='76'>Kazakhstan (+7 6)</option>
<option value='77'>Kazakhstan (+7 7)</option>
<option value='254'>Kenya (+254)</option>
<option value='686'>Kiribati (+686)</option>
<option value='850'>North Korea (+850)</option>
<option value='82'>South Korea (+82)</option>
<option value='965'>Kuwait (+965)</option>
<option value='996'>Kyrgyzstan (+996)</option>
<option value='856'>Laos (+856)</option>
<option value='371'>Latvia (+371)</option>
<option value='961'>Lebanon (+961)</option>
<option value='266'>Lesotho (+266)</option>
<option value='231'>Liberia (+231)</option>
<option value='218'>Libya (+218)</option>
<option value='423'>Liechtenstein (+423)</option>
<option value='370'>Lithuania (+370)</option>
<option value='352'>Luxembourg (+352)</option>
<option value='853'>Macau SAR China (+853)</option>
<option value='389'>Macedonia (+389)</option>
<option value='261'>Madagascar (+261)</option>
<option value='265'>Malawi (+265)</option>
<option value='60'>Malaysia (+60)</option>
<option value='960'>Maldives (+960)</option>
<option value='223'>Mali (+223)</option>
<option value='356'>Malta (+356)</option>
<option value='692'>Marshall Islands (+692)</option>
<option value='596'>Martinique (+596)</option>
<option value='222'>Mauritania (+222)</option>
<option value='230'>Mauritius (+230)</option>
<option value='262'>Mayotte (+262)</option>
<option value='52'>Mexico (+52)</option>
<option value='691'>Micronesia (+691)</option>
<option value='1808'>Midway Island (+1 808)</option>
<option value='373'>Moldova (+373)</option>
<option value='377'>Monaco (+377)</option>
<option value='976'>Mongolia (+976)</option>
<option value='382'>Montenegro (+382)</option>
<option value='1664'>Montserrat (+1 664)</option>
<option value='212'>Morocco (+212)</option>
<option value='258'>Mozambique (+258)</option>
<option value='95'>Myanmar (+95)</option>
<option value='264'>Namibia (+264)</option>
<option value='674'>Nauru (+674)</option>
<option value='977'>Nepal (+977)</option>
<option value='31'>Netherlands (+31)</option>
<option value='599'>Netherlands Antilles (+599)</option>
<option value='1869'>Nevis (+1 869)</option>
<option value='687'>New Caledonia (+687)</option>
<option value='64'>New Zealand (+64)</option>
<option value='505'>Nicaragua (+505)</option>
<option value='227'>Niger (+227)</option>
<option value='234'>Nigeria (+234)</option>
<option value='683'>Niue (+683)</option>
<option value='672'>Norfolk Island (+672)</option>
<option value='1670'>Northern Mariana Islands (+1 670)</option>
<option value='47'>Norway (+47)</option>
<option value='968'>Oman (+968)</option>
<option value='92'>Pakistan (+92)</option>
<option value='680'>Palau (+680)</option>
<option value='970'>Palestinian territories (+970)</option>
<option value='507'>Panama (+507)</option>
<option value='675'>Papua New Guinea (+675)</option>
<option value='595'>Paraguay (+595)</option>
<option value='51'>Peru (+51)</option>
<option value='63'>Philippines (+63)</option>
<option value='48'>Poland (+48)</option>
<option value='351'>Portugal (+351)</option>
<option value='1787'>Puerto Rico (+1 787)</option>
<option value='1939'>Puerto Rico (+1 939)</option>
<option value='974'>Qatar (+974)</option>
<option value='262'>Réunion (+262)</option>
<option value='40'>Romania (+40)</option>
<option value='7'>Russia (+7)</option>
<option value='250'>Rwanda (+250)</option>
<option value='590'>Saint Barthélemy (+590)</option>
<option value='290'>Saint Helena (+290)</option>
<option value='1869'>Saint Kitts and Nevis (+1 869)</option>
<option value='1758'>Saint Lucia (+1 758)</option>
<option value='590'>Saint Martin (+590)</option>
<option value='508'>Saint Pierre and Miquelon (+508)</option>
<option value='1784'>Saint Vincent and the Grenadines (+1 784)</option>
<option value='685'>Samoa (+685)</option>
<option value='378'>San Marino (+378)</option>
<option value='239'>São Tomé and Príncipe (+239)</option>
<option value='966'>Saudi Arabia (+966)</option>
<option value='221'>Senegal (+221)</option>
<option value='381'>Serbia (+381)</option>
<option value='248'>Seychelles (+248)</option>
<option value='232'>Sierra Leone (+232)</option>
<option value='65'>Singapore (+65)</option>
<option value='599'>Sint Maarten (+599)</option>
<option value='421'>Slovakia (+421)</option>
<option value='386'>Slovenia (+386)</option>
<option value='677'>Solomon Islands (+677)</option>
<option value='252'>Somalia (+252)</option>
<option value='27'>South Africa (+27)</option>
<option value='500'>South Georgia and the South Sandwich Islands (+500)</option>
<option value='34'>Spain (+34)</option>
<option value='94'>Sri Lanka (+94)</option>
<option value='249'>Sudan (+249)</option>
<option value='597'>Suriname (+597)</option>
<option value='268'>Swaziland (+268)</option>
<option value='46'>Sweden (+46)</option>
<option value='41'>Switzerland (+41)</option>
<option value='963'>Syria (+963)</option>
<option value='886'>Taiwan, China (+886)</option>
<option value='992'>Tajikistan (+992)</option>
<option value='255'>Tanzania (+255)</option>
<option value='66'>Thailand (+66)</option>
<option value='88216'>Thuraya (Mobile Satellite service) (+88216)</option>
<option value='228'>Togo (+228)</option>
<option value='690'>Tokelau (+690)</option>
<option value='676'>Tonga (+676)</option>
<option value='1868'>Trinidad and Tobago (+1 868)</option>
<option value='216'>Tunisia (+216)</option>
<option value='90'>Turkey (+90)</option>
<option value='993'>Turkmenistan (+993)</option>
<option value='1649'>Turks and Caicos Islands (+1 649)</option>
<option value='688'>Tuvalu (+688)</option>
<option value='256'>Uganda (+256)</option>
<option value='380'>Ukraine (+380)</option>
<option value='971'>United Arab Emirates (+971)</option>
<option value='44'>United Kingdom (+44)</option>
<option value='1'>United States (+1)</option>
<option value='878'>Universal Personal Telecommunications (UPT) (+878)</option>
<option value='598'>Uruguay (+598)</option>
<option value='1340'>U.S. Virgin Islands (+1 340)</option>
<option value='998'>Uzbekistan (+998)</option>
<option value='678'>Vanuatu (+678)</option>
<option value='39066'>Vatican (+39 066)</option>
<option value='379'>Vatican (+379)</option>
<option value='58'>Venezuela (+58)</option>
<option value='84'>Vietnam (+84)</option>
<option value='1808'>Wake Island (+1 808)</option>
<option value='681'>Wallis and Futuna (+681)</option>
<option value='967'>Yemen (+967)</option>
<option value='260'>Zambia (+260)</option>
<option value='255'>Zanzibar (+255)</option>
<option value='263'>Zimbabwe (+263)</option>
</select>

wikipedia_dialing_codes_to_select.rb

#!/usr/bin/env ruby
require 'nokogiri'
require 'open-uri'

# read the wikipedia table
doc = Nokogiri::HTML(open('http://en.wikipedia.org/wiki/List_of_country_calling_codes'))
table = doc.xpath("//h3/span[@id='Complete_listing']/parent::h3/following-sibling::table").first

# iterate over every td, td pair (country name and dial codes)
puts "<select>"
table.xpath("tr/td").each_slice(2) do |country, dial_codes|
  country_name = country.xpath("text()").text
  dial_codes.xpath("a/text()").each do |dial_code|
    dial_code_text = dial_code.text
    dial_code_nums = dial_code_text.gsub(/\D+/, '')
    puts "<option value='#{dial_code_nums}'>#{country_name} (#{dial_code_text})</option>"
  end
end
puts "</select>"