In order to place a call from one country to another, you are required to use country and city codes. Country codes help with the processing of data and communications. City codes are used in conjunction with country codes and establish what location in the country the call is coming from. If you are planning a vacation out of the country and are going to purchase international cell phone service it is a good idea to program all the city and country codes you will need into your phone before your departure.
| Country | Country Codes | City Codes |
| Antigua | 268 | No city codes required |
| Argentina | 54 | Buenos Aires 11, Cordoba 51, San Juan 64 |
| Armenia | 374 | No city codes required |
| Aruba | 297 | All points 8 plus 5 digits |
| Australia | 61 | Brisbane 07, Darwin 08, Melbourne 03, Sydney 02 |
| Austria | 43 | Linz 70, Vienna 1 |
| Bahamas | 242 | No city codes required |
| Bangladesh | 880 | Chittagong 31, Dhaka 2, Rangpur 521 |
| Barbados | 246 | No city codes required |
| Belgium | 32 | Antwerp 3, Brussels 2, Ostend 59 |
| Belize | 501 | Belize City 2, Punta Gorda 7, San Pedro 26 |
| Bermuda | 441 | No city codes required |
| Bolivia | 591 | Cotoga 388, La Paz 2, Santa Cruz 33 |
| Bosnia | 387 | |
| Brazil | 55 | Rio De Janeiro 21, Salvador 71, Santo Andre 11 |
| British Virgin Islands | 284 | No city codes required |
| Bulgaria | 359 | Burgas 56, Kardjali 361, Ruse 82, Sofia 2 |
| Cambodia | 855 | |
| Canada | 1 | Alberta 403, Montreal 514, Quebec 418, Toronto 416 |
| Cayman Islands | 345 | |
| China | 86 | Beijing 10, Guangzhou 20, Shanghai 21 |
| Colombia | 57 | Bogota 1, Palmira 2, Santa Marta 54 |
| Costa Rica | 506 | |
| Croatia | 385 | Dubrovnik 20, Rijeka 51 |
| Cuba | 53 | Habana City 7, Nuevitas 32 |
| Czech Republic | 420 | Havirov 6694, Ostrava 69, Prague 2 |
| Denmark | 45 | No city codes required |
| Dominican Republic | 809 | No city codes required |
| Ecuador | 593 | Cuenca 7, Esmeraldas 2, Santo Domingo 2 |
| Egypt | 20 | Alexandria 3, Cairo 2, Luxor 95 |
| El Salvador | 503 | |
| Fiji Islands | 679 | |
| Finland | 358 | Helinski 9, Kotka 5, Pori 2, Varkaus 17 |
| France | 33 | Bordeaux 56, Cannes 93, Marseilles 91, Paris 1 |
| Germany | 49 | Berlin 30, Cologne 221, Hamburg 40, Munich 89 |
| Ghana | 233 | Accra 21, Koforidua 81, Kumasi 51 |
| Greece | 30 | Athens 01, Tripoli 071 |
| Guatemala | 502 | Antigua 9, Guatemala City 2 |
| Guyana | 592 | Bartica 5, Georgetown 2, Hope 66 |
| Honduras | 504 | |
| Hong Kong | 852 | |
| Hungary | 36 | Budapest 1, Gyor 96, Kaposvar 82 |
| Iceland | 354 | |
| India | 91 | Bangalore 80, Bombay (Mumbai) 22, New Delhi 11 |
| Ireland | 353 | Cork 21, Dublin 1, Galway 91, Limerick 61 |
| Israel | 972 | Azur 3, Jerusalem 2, Tel Aviv 3 |
| Italy | 39 | Florence 055, Milan 02, Rome 06, Venice 041 |
| Jamaica | 876 | |
| Japan | 81 | Nagasaki 958, Osaka 66, Tokyo 3 |
| Kazakhstan | 7 | Chimkent 325, Guryev 312 |
| Kenya | 254 | Mombasa 11, Nairobi 2 |
| Korea (North) | 850 | Pyong Yang 2 |
| Korea (South) | 82 | Anyang 343, Ichian 336, Seoul 2 |
| Lebanon | 961 | Beirut 1, Tripoli 6, Zahle 8 |
| Libya | 218 | Agelat 282, Misuratha 51, Tripoli 21, Zawai 23 |
| Madagascar | 261 | Antalaha 8, Domasi 531, Malawi 265 |
| Malaysia | 60 | Baranang 3, Ipoh 5, Kuala Lumpur 3, Maran 95 |
| Mexico | 52 | Acapulco 74, Cancun 98, Mexico City 5, Tijuana 66 |
| Monaco | 33 | All points 93 |
| Morocco | 212 | Casablanca 2, Marrakech 4, Nador 660 |
| Namibia | 264 | Gobabis 681, Olympia 61 |
| Netherlands | 31 | Amsterdam 20, Gouda 182, Rotterdam 10 |
| New Zealand | 64 | Auckland 9, Hamilton 7, Nelson 3, Wellington 4 |
| Nicaragua | 505 | Granada 552, Managua 2, San Marcos 43 |
| Norway | 47 | |
| Pakistan | 92 | Islamabad 51, Karachi 21, Peshawar 521 |
| Peru | 51 | Cuzco 84, Lima 14 |
| Philippines | 63 | Dagupan 48, Manila 2 |
| Poland | 48 | Krakow 12, Warsaw 2 |
| Portugal | 351 | Lisbon 1, Santa Cruz 92, Velas 95 |
| Puerto Rico | 787 | |
| Romania | 40 | Constantina 16, Galati 34, Pitesti 76 |
| Russia | 7 | Moscow 095, St. Petersburg 812 |
| Saudi Arabia | 966 | Abha 7, Mecca 2, Tabuk 4 |
| Singapore | 65 | |
| South Africa | 27 | Cape Town 21, Johannesburg 11, Port Elizabeth 41 |
| Spain | 34 | Barcelona 3, Madrid 91, Sevilla 95, Valencia 96 |
| Sri Lanka | 94 | Maradana 1 |
| Sweden | 46 | Boras 33, Stockholm 8, Vasteras 21 |
| Switzerland | 41 | Basel 61, Geneva 22, Zurich 1 |
| Syria | 963 | Banias 43, Haba 33, Safita 43 |
| Taiwan | 886 | Chunan 36, Ping Tung 8, Taipei 2 |
| Thailand | 66 | Bangkok 2, Chiang Mai 53 |
| Turkey | 90 | Ankara 312, Istanbul (Asia) 216, Istanbul (Europe) 212 |
| Turks and Caicos | 649 | No city codes required |
| Ukraine | 380 | Kharkov 57, Kiev 44 |
| United Arab Emirates | 971 | Abu Dhabi 2, Dubai 4, Tarif 53 |
| United Kingdom | 44 | Belfast 2890, Edinburgh 131, Glasgow 141, London 20 |
| USA | 1 | A complete list of US area codes |
| Venezuela | 58 | Barcelona 81, Cumana 93, Valencia 41 |
| Vietnam | 84 | Ha Noi 4, Ho Chi Min 8, Quang Nam 510 |
| Yugoslavia | 381 | Belgrade 11, Pirot 10, Titograd 81 |
| Zambia | 260 | Kitwe 2, Lusaka 1 |
Country and City Codes - a complete list of country and many city codes
Zip Code Lookup - a zip code lookup system for all states from the United States Postal Service
World Postal Codes - a list of resources for zip and postal codes for countries all over the world