| País | Código del país | IDD | NDD |
| Canada | + 001 | 011 | 1 |
| Estados Unidos y sus territorios | + 1 | 00 | 0 |
| Bahamas | + 1-242 | 011 | 1 |
| Barbados | + 1-246 | 011 | 1 |
| Anguila | + 1-264 | 011 | 1 |
| Antigua y Barbuda | + 1-268 | 011 | 1 |
| Islas Vírgenes Británicas | + 1-284 | 011 | 1 |
| Islas Caimán | + 1-345 | 011 | 1 |
| Granada | + 1-473 | 011 | 1 |
| Turcos y Caicos | + 1-649 | 011 | 1 |
| Montserrat | + 1-664 y 18 | 011 | 1 |
| Santa Lucia | + 1-758 | 011 | 1 |
| Dominica | + 1-767 | 011 | 1 |
| Saint Vincent y Iase Grenadines | + 1-784 | 011 | 1 |
| República Dominicana | + 1-809 | 011 | 1 |
| Trinidad y Tobago | + 1-868 | 011 | 1 |
| Saint Kitts y Nevis | + 1-869 | 011 | 1 |
| Jamaica | + 1-876 | 011 | 1 |
| Egipto | + 20 | 00 | 0 |
| reservado Marruecos | + 210 | 00 | 0 |
| reservado Marruecos | + 211 | 00 | 0 |
| Marruecos | + 212 | 00** | 0 |
| Argelia | + 213 | 00** | 7 |
| reservado Argelia | + 214 | 00 | 0 |
| reservado Argelia | + 215 | 00 | 0 |
| Túnez | + 216 | 00 | 0 |
| reservado Túnez | + 217 | 00 | 0 |
| Libia | + 218 | 00 | 0 |
| reservado Libia | + 219 | 00 | 0 |
| Gambia | + 220 | 00 | |
| Senegal | + 221 | 00 | 0 |
| Mauritania | + 222 | 00 | 0 |
| Mali | + 223 | 00 | 0 |
| Guinea | + 224 | 00 | 0 |
| Costa de Marfil | + 225 | 00 | 0 |
| Burkina Faso | + 226 | 00 | |
| Niger | + 227 | 00 | 0 |
| Togo | + 228 | 00 | |
| Benin | + 229 | 00 | |
| Mauricio | + 230 | 00 | 0 |
| Liberia | + 231 | 00 | 22 |
| Sierra Leona | + 232 | 00 | 0 |
| Ghana | + 233 | 00 | |
| Nigeria | + 234 | 009 | 0 |
| Chad | + 235 | 00 | 0 |
| República Centroafricana | + 236 | 00 | |
| Camerún | + 237 | 00 | |
| Cabo Verde | + 238 | 0 | |
| Santo Tomé y Príncipe | + 239 | 00 | 0 |
| Guinea Ecuatorial | + 240 | 00 | 0 |
| Gabon | + 241 | 00 | |
| República del Congo (Brazzaville) | + 242 | 00 | |
| República Democrática del Congo (Kinshasa, antes Zaire) | + 243 | 00 | |
| Angola | + 244 | 00 | 0 |
| Guinea-Bissau | + 245 | 00 | |
| Diego García | + 246 | 00 | |
| Isla Ascención | + 247 | 00 | |
| Islas Seychelles | + 248 | 00 | 0 |
| Sudán | + 249 | 00 | 0 |
| Rwanda | + 250 | 00 | 0 |
| Etiopía | + 251 | 00 | 0 |
| Somalía | + 252 | 00 | |
| Djibouti | + 253 | 00 | |
| Kenia | + 254 | 00 | 0 |
| Tanzania | + 255 | 000 005 a Kenya 006 a Uganda | 0 |
| Uganda | + 256 | 000 005 a Kenya 007 a Tanzania | 0 |
| Burundi | + 257 | 00 | |
| Mozambique | + 258 | 00 | 0 |
| Zanzibar | + 259 | 00 | 0 |
| Zambiz | + 260 | 00 | 0 |
| Madagascar | + 261 | 00 | 0 |
| Isla Reunión | + 262 | 00 | 0 |
| Zimbabwe | + 263 | 00 | 0 |
| Namibia | + 264 | 00 | 0 |
| Malawi | + 265 | 00 | |
| Lesoto | + 266 | 00 | 0 |
| Botswana | + 267 | 00 | |
| Swazilandia | + 268 | 00 | |
| Comoros y Mayotte | + 269 | 00 | |
| Sudáfrica | + 27 | 09 | 0 |
| no asignado | + 28x | 00 | 0 |
| Santa Helena | + 290 | 00 | |
| Eritrea | + 291 | 00 | 0 |
| no asignado | + 292 | 00 | 0 |
| no asignado | + 293 | 00 | 0 |
| no asignado | + 294 | 00 | 0 |
| descontinuado (fue asignado a San Marino ver. +378) | + 295 | 00 | 0 |
| no asignado | + 296 | 00 | 0 |
| Aruba | + 297 | 00 | |
| Islas Faroe | + 298 | 00 | |
| Groelandia | + 299 | 00 | |
| Grecia | + 30 | 00 | no requerido |
| Holanda | + 31 | 00 | 0 |
| Bélgica | + 32 | 00 | 0 |
| Francia | + 33 | 00 (France Telecom) 40 (TELE 2) 50 (OMNICOM) 70 (LE 7 CEGETEL) 90 (9 TELECOM) | 0 |
| España | + 34 | 00 | 0 |
| Gibraltar | + 350 | 00 | |
| Portugal | + 351 | 00 882 Rubicon/BT "GeoVerse" | no requerido |
| Luxemburgo | + 352 | 00 | no requerido |
| Irlanda | + 353 | 00 048 a Irlanda Norte (este arreglo es mucho mas barato que llamar a través del UK usando el código 44) | 0 |
| Islandia | + 354 | 00 | 0 |
| Albania | + 355 | 00 | 0 |
| Malta | + 356 | 00 | 0 |
| Chipre | + 357 | 00 | no requerido |
| Finlandia | + 358 | 00, 990, 994, 999 | 0 |
| Bulgaria | + 359 | 00 | 0 |
| Hungría | + 36 | 00 | 06 |
| fue Alemania Oriental ahora es 43 | + 37 | 00 | 0 |
| Latvia | + 371 | 00 | 8 |
| Estonia | + 372 | 00 | no requerido |
| Moldova | + 373 | 00 | 0 |
| Armenia | + 374 | 00 | 8 |
| Belarús | + 375 | 8**10 | 8 |
| Andorra | + 376 | 00 | |
| Mónaco | + 377 | 00 | 0 |
| San Marino | + 378 | 00 | 0 |
| Vaticano | + 379 | 00 | |
| antigua Yugoslavia | + 38 | 00 | 0 |
| Ucrania | + 380 | 8**10 | 8 |
| Serbia y Montenegro | + 381 | 99 | 0 |
| no asignado | + 382 | 00 | 0 |
| no asignado | + 383 | 00 | 0 |
| no asignado | + 384 | 00 | 0 |
| Croacia | + 385 | 00 | 0 |
| Eslovenia | + 386 | 00 | 0 |
| Bosnia y Herzegovina | + 387 | 00 | 0 |
| Espacio de numeracion telefonica europea | + 388 | 00 | 0 |
| República de Macedonia | + 389 | 00 | 0 |
| Italia | + 39 | 00 | ver en el país |
| Rumania | + 40 | 00 | 0 |
| Suiza | + 41 | 00 | 0 |
| antes Checoslovaquia | + 42 | 00 | 0 |
| Chequia | + 420 | 00 95200 Discount carrier | no requerido |
| Eslovaquia | + 421 | 00 | 0 |
| no asignado | + 422 | 00 | 0 |
| Liechtenstein | + 423 | 00 | no requerido |
| no asignado | + 424 | 00 | 0 |
| no asignado | + 425 | 00 | 0 |
| no asignado | + 426 | 00 | 0 |
| no asignado | + 427 | 00 | 0 |
| no asignado | + 428 | 00 | 0 |
| no asignado | + 429 | 00 | 0 |
| Austria | + 43 | 00 | 0 |
| Reino Unido | + 44 | 00 (incluyendo ADSL e ISDN) | 0 |
| Dinamarca | + 45 | 00 | |
| Suecia | + 46 | 00 | 0 |
| Noruega | + 47 | 00 | no requerido |
| Polonia | + 48 | 0**0 | 0 |
| Alemania | + 49 | 00 | 0 |
| Islas Falkland (Malvinas) | + 500 | 00 | |
| Belice | + 501 | 00 | 0 |
| Guatemala | + 502 | 00 130+00 Telefonica 147-00 Telgua | no requerido |
| El Salvador | + 503 | 00 144+00 Telefonica | |
| Honduras | + 504 | 00 | 0 |
| Nicaragua | + 505 | 00 | 0 |
| Costa Rica | + 506 | 00 | |
| Panamá | + 507 | 00 Cable & Wireless 088+00 Telecarrier 055+00 Clarocom | 0 |
| San Pierre y Miquelon | + 508 | 00 | 0 |
| Haití | + 509 | 00 | 0 |
| Perú | + 51 | 00 | 0 |
| México | + 52 | 00 | 01 |
| Cuba | + 53 | 119 | 0 |
| Argentina | + 54 | 00 | 0 |
| Brasil | + 55 | 0014 (Brasil Telecom) 0015 (Telefonica) 0021 (Embratel) 0023 (Intelig) 0031 (Telemar) | 0014 (Brasil Telecom) 0015 (Telefonica) 0021 (Embratel) 0023 (Intelig) 0031 (Telemar) |
| Chile | + 56 | 00 | 0 |
| Colombia | + 57 | 005 Orbitel 007 ETB 009 Telecom #555 Bellsouth #999 Comcel | 005 Orbitel 007 ETB 009 Telecom #555 Bellsouth #999 Comcel |
| Venezuela | + 58 | 00 01-02-0 - Etelix 01-07-0 - http://www.multiphone.net.ve 01-10-0 - CANTV 01-11-0 - Convergence Comunications 01-14-0 - Telcel, C.A. 01-19-0 - Totalcom Venezuela 01-23-0 - Orbitel de Venezuela, C.A. ENTEL Venezuela 01-50-0 | 0 |
| Guadalupe | + 590 | 00 | |
| Bolivia | + 591 | 0010(ENTEL) 0011 (AES COMMUNICATIONS BOLIVIA) 0012 (TELEDATA) 0013 (BOLIVIATEL) | 0010(ENTEL) 0011 (AES COMMUNICATIONS BOLIVIA) 0012 (TELEDATA) 0013 (BOLIVIATEL) |
| Guyana | + 592 | 001 | 0 |
| Ecuador | + 593 | 00 | 0 |
| Guyana Francesa | + 594 | 00 | |
| Paraguay | + 595 | 002 | 0 |
| Martinica | + 596 | 00 | 0 |
| Surinam | + 597 | 00 | |
| Uruguay | + 598 | 00 | 0 |
| Antillas Holandesas | + 599 | 00 | 0 |
| Malasia | + 60 | 00 | 0 |
| Australia | + 61 | 0011 | 0 |
| Indonesia | + 62 | 001, 008 | 0 |
| Filipinas | + 63 | 00 | 0 |
| Nueva Zelanda | + 64 | 00 | 0 |
| Singapur | + 65 | 001 - Singtel IDD 002 - MobileOne IDD 008 - Starhub IDD 012 - Singtel FaxPlus (Fax over IP) 013 - Singtel BudgetCall (Voice recommended only/Fax possible) 018 - Starhub I-Call (Voice over IP) 019 - Singtel V019 (Voice over IP) | |
| Tailandia | + 66 | 001 | 0 |
| Timor Este - antes Islas Marias del Norte | + 670 | 00 | |
| antes Guam | + 671 | 00 | 0 |
| Territorios Australianos externos: Antartica, Navidad, Cocos, Islas Norfolk | + 672 | 00 | 0 |
| Brunei Darussalam | + 673 | 00 | 0 |
| Nauru | + 674 | 00 | 0 |
| Papúa Nueva Guinea | + 675 | 05 | |
| Tonga | + 676 | 00 | 0 |
| Islas Solomon | + 677 | 00 | |
| Vanuatu | + 678 | 00 | |
| Fiji | + 679 | 00 | |
| Palau | + 680 | 011 | |
| Wallis y Futuna | + 681 | 19** | 0 |
| Islas Cook | + 682 | 00 | 00 |
| Isla Niue | + 683 | 00 | 0 |
| Samoa Americana | + 684 | 00 | |
| Samoa Oeste | + 685 | 00 | 0 |
| Kiribati, Islas Gilberto | + 686 | 00 | 0 |
| Nueva Caledonia | + 687 | 00 | 0 |
| Tuvalu, Islas Ellice | + 688 | 00 | |
| Polinesia Francesa | + 689 | 00 | |
| Tokelau | + 690 | 00 | |
| Estados Federados de Micronesia | + 691 | 00 | 0 |
| Islas Marshall | + 692 | 011 | 1 |
| no asignado | + 693 | 00 | 0 |
| no asignado | + 694 | 00 | 0 |
| no asignado | + 695 | 00 | 0 |
| no asignado | + 696 | 00 | 0 |
| no asignado | + 697 | 00 | 0 |
| no asignado | + 698 | 00 | 0 |
| no asignado | + 699 | 00 | 0 |
| Rusia | + 7 | 8**10 | 8 |
| INTERNACIONAL | + 800 | | |
| no asignado | + 801 | 00 | 0 |
| no asignado | + 802 | 00 | 0 |
| no asignado | + 803 | 00 | 0 |
| no asignado | + 804 | 00 | 0 |
| no asignado | + 805 | 00 | 0 |
| no asignado | + 806 | 00 | 0 |
| no asignado | + 807 | 00 | 0 |
| reservado para Servicios de Costas Internacionales | + 808 | 00 | 0 |
| no asignado | + 809 | 00 | 0 |
| Japón | + 81 | 001 (KDD) 010 (MYLINE/MYLINE PLUS) 0061 (Cable & Wireless IDC) 0041 (Japan Telecom) | 0 |
| Corea del Sur | + 82 | 001, 002 00700 (Speed/ SKTelecom mobiles) | 0, 082 |
| no asignado | + 83x | 00 | 0 |
| Vietnam | + 84 | 00 | 0 |
| Corea del Norte | + 850 | 00 | 0 |
| no asignado | + 851 | 00 | 0 |
| Hong Kong | + 852 | 001-- PCCW 0080 -- Hutchison 009 -- New World | |
| Macao | + 853 | 00 | 0 |
| no asignado | + 854 | 00 | 0 |
| Camboya | + 855 | 001 | 0 |
| Laos | + 856 | 00 | 0 |
| no asignado | + 857 | 00 | 0 |
| no asignado | + 858 | 00 | 0 |
| no asignado | + 859 | 00 | 0 |
| China | + 86 | 00 | 0 |
| Servicio "SNAC" Inmarsat | + 870 | 00 | 0 |
| Inmarsat (Atlántico Este) | + 871 | 00 | |
| Inmarsat (Pacífico) | + 872 | 00 | |
| Inmarsat (Indias) | + 873 | 00 | |
| Inmarsat (Atlántico Oeste) | + 874 | 00 | |
| reservado para Servicios de Marina Moviles | + 875 | 00 | 0 |
| reservado para Servicios de Marina Moviles | + 876 | 00 | 0 |
| reservado para Servicios de Marina Moviles | + 877 | 00 | 0 |
| Servicios de Telefonia Personal Universal | + 878 | 00 | 0 |
| reservado para Usos nacionales maritimos/moviles | + 879 | 00 | 0 |
| Bangladesh | + 880 | 00 | 0 |
| Sistema Móvil Satelital | + 881 | 00 | 0 |
| Telecomunicaciones Internacionales | + 882 | 00 | 0 |
| no asignado | + 883 | 00 | 0 |
| no asignado | + 884 | 00 | 0 |
| no asignado | + 885 | 00 | 0 |
| Taiwan | + 886 | 002 | |
| no asignado | + 887 | 00 | 0 |
| no asignado | + 888 | 00 | 0 |
| no asignado | + 889 | 00 | 0 |
| no asignado | + 89x | 00 | 0 |
| Turquía | + 90 | 00 | 0 |
| India | + 91 | 00 | 0 |
| Pakistán | + 92 | 00 | 0 |
| Afganistán | + 93 | 00 | 0 |
| Sri Lanka | + 94 | 00 | 0 |
| Burma (Myanmar) | + 95 | 00 | 0 |
| Maldivas | + 960 | 00 | 0 |
| Líbano | + 961 | 00 | 0 |
| Jordania | + 962 | 00 | 0 |
| Siria | + 963 | 00 | 0 |
| Irak | + 964 | 00 | 0 |
| Kuwait | + 965 | 00 | 0 |
| Arabia Saudita | + 966 | 00 | 0 |
| Yemen | + 967 | 00 | 0 |
| Omán | + 968 | 00 | 0 |
| antes Rep. Dem. deYemen | + 969 | 00 | 0 |
| Palestina | + 970 | 00 | 0 |
| Emiratos Arabes Unidos | + 971 | 00 | 0 |
| Israel | + 972 | 00 (no disponible desde teléfonos publicos) 012 (Golden Lines) 013 (Barak LTD) 014 (Bezeq LTD) | 0 |
| Bahran | + 973 | 00 | |
| Qatar | + 974 | 00 | 0 |
| Bhutan | + 975 | 00 | 0 |
| Mongolia | + 976 | 00 | 0 |
| Nepal | + 977 | 00 | 0 |
| no asignado | + 978 | 00 | 0 |
| Servicio Premium de Tarifa ITNL | + 979 | 00 | 0 |
| Irán | + 98 | 00 | 0 |
| no asignado | + 990 | 00 | 0 |
| Servicio Internacional de Telecomunicaciones de Correspondencia Pública | + 991 | 00 | 0 |
| Tajakistán | + 992 | 8**10 | 8 |
| Turkmenistán | + 993 | 8**10 | 8 |
| Azerbaiján | + 994 | 00 | 8 |
| Georgia | + 995 | 8**10 | 8 |
| Kyrgyzstán | + 996 | 00 | 0 |
| no asignado | + 997 | 00 | 0 |
| Uzbekistán | + 998 | 8**10 | 8 |
| no asignado | + 999 | 00 | 0 |