International telephone and fax numbers called from the United States all need a prefix of (011), then the country code listed below, then the number in the ASU Travel Guide listings.
| Afghanistan | 93 | Kyrgyzstan | 996 |
| Albania | 355 | Laos | 856 |
| Algeria | 213 | Latvia | 371 |
| American Samoa | 1-684 | Lebanon | 961 |
| Andorra | 376 | Lesotho | 266 |
| Angola | 244 | Liberia | 231 |
| Anguilla | 1-264 | Libya | 218 |
| Antigua and Barbuda | 1-268 | Liechtenstein | 423 |
| Argentina | 54 | Lithuania | 370 |
| Armenia | 374 | Luxembourg | 352 |
| Aruba | 297 | Macau SAR China | 853 |
| Ascension | 247 | Macedonia | 389 |
| Australia | 61 | Madagascar | 261 |
| Australian External Territories | 672 | Malawi | 265 |
| Austria | 43 | Malaysia | 60 |
| Azerbaijan | 994 | Maldives | 960 |
| Bahamas | 1-242 | Mali | 223 |
| Bahrain | 973 | Malta | 356 |
| Bangladesh | 880 | Marshall Islands | 692 |
| Barbados | 1-246 | Martinique | 596 |
| Barbuda | 1-268 | Mauritania | 222 |
| Belarus | 375 | Mauritius | 230 |
| Belgium | 32 | Mayotte | 262 |
| Belize | 501 | Mexico | 52 |
| Benin | 229 | Micronesia | 691 |
| Bermuda | 1-441 | Midway Island | 1-808 |
| Bhutan | 975 | Moldova | 373 |
| Bolivia | 591 | Monaco | 377 |
| Bosnia and Herzegovina | 387 | Mongolia | 976 |
| Botswana | 267 | Montenegro | 382 |
| Brazil | 55 | Montserrat | 1-664 |
| British Indian Ocean Territory | 246 | Morocco | 212 |
| British Virgin Islands | 1-284 | Mozambique | 258 |
| Brunei | 673 | Myanmar | 95 |
| Bulgaria | 359 | Namibia | 264 |
| Burkina Faso | 226 | Nauru | 674 |
| Burundi | 257 | Nepal | 977 |
| Cambodia | 855 | Netherlands | 31 |
| Cameroon | 237 | Netherlands Antilles (Curacao) | 599 |
| Canada | 1 | Netherlands Antilles (Curacao) | 599 |
| Cape Verde | 238 | Nevis | 1-869 |
| Cayman Islands | 1-345 | New Caledonia | 687 |
| Central African Republic | 236 | New Zealand | 64 |
| Chad | 235 | Nicaragua | 505 |
| Chatham Island (New Zealand) | 64 | Niger | 227 |
| Chile | 56 | Nigeria | 234 |
| China | 86 | Niue | 683 |
| Christmas Island | 61 | Norfolk Island | 672 |
| Cocos-Keeling Islands | 61 | North Korea | 850 |
| Colombia | 57 | Northern Mariana Islands | 1-670 |
| Comoros | 269 | Norway | 47 |
| Congo | 242 | Oman | 968 |
| Congo - Brazzaville | 242 | Pakistan | 92 |
| Congo - Kinshasa | 243 | Palau | 680 |
| Congo, Dem. Rep. of (Zaire) | 243 | Palestinian Territory | 970 |
| Cook Islands | 682 | Panama | 507 |
| Costa Rica | 506 | Papua New Guinea | 675 |
| Croatia | 385 | Paraguay | 595 |
| Cuba | 53 | Peru | 51 |
| Cuba (Guantanamo Bay) | 5399 | Philippines | 63 |
| Cyprus | 357 | Poland | 48 |
| Czech Republic | 420 | Portugal | 351 |
| Denmark | 45 | Puerto Rico | 1-787 |
| Diego Garcia | 246 | Puerto Rico | 1-939 |
| Djibouti | 253 | Qatar | 974 |
| Dominica | 1-767 | Réunion | 262 |
| Dominican Republic | 1-809 | Romania | 40 |
| Dominican Republic | 1-829 | Russia | 7 |
| Dominican Republic | 1-849 | Rwanda | 250 |
| East Timor | 670 | Saint Barthélemy | 590 |
| Easter Island | 56 | Saint Helena | 290 |
| Ecuador | 593 | Saint Kitts and Nevis | 1-869 |
| Egypt | 20 | Saint Lucia | 1-758 |
| El Salvador | 503 | Saint Martin | 590 |
| Ellipso (Mobile Satellite service) | 8812 | Saint Pierre and Miquelon | 508 |
| Ellipso (Mobile Satellite service) | 8813 | Saint Vincent and the Grenadines | 1-784 |
| EMSAT (Mobile Satellite service) | 88213 | Samoa | 685 |
| Equatorial Guinea | 240 | San Marino | 378 |
| Eritrea | 291 | São Tomé and Príncipe | 239 |
| Estonia | 372 | Saudi Arabia | 966 |
| Ethiopia | 251 | Senegal | 221 |
| Falkland Islands | 500 | Serbia | 381 |
| Faroe Islands | 298 | Seychelles | 248 |
| Fiji | 679 | Sierra Leone | 232 |
| Finland | 358 | Singapore | 65 |
| France | 33 | Slovakia | 421 |
| French Antilles | 596 | Slovenia | 386 |
| French Guiana | 594 | Solomon Islands | 677 |
| French Polynesia | 689 | Somalia | 252 |
| Gabon | 241 | South Africa | 27 |
| Gambia | 220 | South Georgia and the South Sandwich Islands | 500 |
| Georgia | 995 | South Korea | 82 |
| Germany | 49 | Spain | 34 |
| Ghana | 233 | Sri Lanka | 94 |
| Gibraltar | 350 | Sudan | 249 |
| Global Mobile Satellite System (GMSS) | 881 | Suriname | 597 |
| Globalstar (Mobile Satellite Service) | 8818 | Swaziland | 268 |
| Globalstar (Mobile Satellite Service) | 8819 | Sweden | 46 |
| Greece | 30 | Switzerland | 41 |
| Greenland | 299 | Syria | 963 |
| Grenada | 1-473 | Tahiti | 689 |
| Guadeloupe | 590 | Taiwan | 886 |
| Guam | 1-671 | Tajikistan | 992 |
| Guantanamo Bay | 5399 | Tanzania | 255 |
| Guatemala | 502 | Thailand | 66 |
| Guinea | 224 | Thuraya (Mobile Satellite service) | 88216 |
| Guinea-Bissau | 245 | Timor Leste | 670 |
| Guyana | 592 | Togo | 228 |
| Haiti | 509 | Tokelau | 690 |
| Honduras | 504 | Tonga | 676 |
| Hong Kong SAR China | 852 | Trinidad and Tobago | 1-868 |
| Hungary | 36 | Tunisia | 216 |
| Iceland | 354 | Turkey | 90 |
| ICO Global (Mobile Satellite Service) | 8810 | Turkmenistan | 993 |
| India | 91 | Turks and Caicos Islands | 1-649 |
| Indonesia | 62 | Tuvalu | 688 |
| Inmarsat SNAC | 870 | U.S. Virgin Islands | 1-340 |
| International Freephone Service | 800 | Uganda | 256 |
| International Shared Cost Service (ISCS) | 808 | Ukraine | 380 |
| Iran | 98 | United Arab Emirates | 971 |
| Iraq | 964 | United Kingdom | 44 |
| Ireland | 353 | United States | 1 |
| Iridium (Mobile Satellite service) | 8816 | Universal Personal Telecommunications (UPT) | 878 |
| Iridium (Mobile Satellite service) | 8817 | Uruguay | 598 |
| Israel | 972 | Uzbekistan | 998 |
| Italy | 39 | Vanuatu | 678 |
| Ivory Coast | 225 | Vatican | 379 |
| Jamaica | 1-876 | Venezuela | 58 |
| Japan | 81 | Vietnam | 84 |
| Jordan | 962 | Wake Island | 808 |
| Kazakhstan | 7-7 | Wallis and Futuna | 681 |
| Kenya | 254 | Yemen | 967 |
| Kiribati | 686 | Zambia | 260 |
| Kuwait | 965 | Zanzibar | 255 |
