| Country | ISO Code | Count | |
|---|---|---|---|
| Madagascar | MG | 1415 | |
| Tanzania | TZ | 433 | |
| Mexico | MX | 254 | |
| Bolivia | BO | 228 | |
| Cameroon | CM | 221 | |
| Gabon | GA | 194 | |
| Peru | PE | 170 | |
| Nicaragua | NI | 127 | |
| Ecuador | EC | 114 | |
| Costa Rica | CR | 97 | |
| Aleutian Isl, Hawaiian Isl, United States | US | 84 | |
| Brazil | BR | 69 | |
| Paraguay | PY | 65 | |
| Central African Republic | CF | 63 | |
| Kenya | KE | 58 | |
| Ivory Coast | CI | 55 | |
| Zaire (please use Democratic Republic of the Congo), Congo (Kinshasa). This is now Democratic Republic of the Congo, Democratic Republic of the Congo | CD | 54 | |
| Colombia | CO | 53 | |
| Venezuela | VE | 46 | |
| China | CN | 42 | |
| Panama | PA | 41 | |
| Liberia | LR | 40 | |
| Malawi | MW | 37 | |
| Guinea | GN | 37 | |
| El Salvador | SV | 34 | |
| Argentina | AR | 29 | |
| Puerto Rico | PR | 28 | |
| Vietnam | VN | 27 | |
| Benin | BJ | 25 | |
| Honduras | HN | 24 | |
| Ghana | GH | 23 | |
| Belize | BZ | 22 | |
| Uganda | UG | 22 | |
| Philippines | PH | 16 | |
| Ethiopia | ET | 16 | |
| Caribbean | JM | 16 | |
| Andaman Isl, Assam, India | IN | 15 | |
| São Tomé and Príncipe, Principe (do not use), Sao Tome (do not use) | ST | 15 | |
| Burundi | BI | 14 | |
| Zambia | ZM | 11 | |
| Sierra Leone | SL | 10 | |
| Thailand | TH | 9 | |
| DO | 9 | ||
| Zimbabwe | ZW | 9 | |
| Guatemala | GT | 8 | |
| Mozambique Channel Isl, Mozambique | MZ | 8 | |
| TT | 7 | ||
| Guyana | GY | 7 | |
| Indonesia, Irian Jaya, Java, Moluccas, Sulawesi, Sumatra | ID | 6 | |
| Comoros | KM | 6 | |
| New Caledonia | NC | 5 | |
| Nigeria | NG | 5 | |
| Suriname | SR | 5 | |
| Namibia | NA | 4 | |
| Sri Lanka | LK | 4 | |
| Chile, Easter Island, Juan Fernandez Isl | CL | 4 | |
| Republic of the Congo | CG | 4 | |
| Bioko, Equatorial Guinea, Pagalu (Annobon) | GQ | 3 | |
| Uruguay | UY | 2 | |
| Sudan | SD | 2 | |
| Marion-Prince Edward Isl, South Africa | ZA | 2 | |
| Somalia | SO | 1 | |
| Bismarck Archipelago, Bougainville, Papua New Guinea | PG | 1 | |
| Laos | LA | 1 | |
| Cambodia | KH | 1 | |
| Malaysia, Sabah, Spratly Isl, Sarawak | MY | 1 | |
| France | FR | 1 | |
| Japan, Kazan-retto, Marcus Isl, Ogasawara-shoto | JP | 1 | |
| HT | 1 | ||
| Cuba | CU | 1 | |
| Bangladesh | BD | 1 | |
| Bahamas | BS | 1 | |
| Total | 4464 |