The distinguishing sign of the country must be displayed on the rear of the vehicle. The sign can be placed separately from the license plate or incorporated into the vehicle’s license plate.
License plates mounted on vehicles usually also display the code of the country that issued that registration number. The allocation of codes is overseen by various international organizations and committees through widely accepted conventions. Many vehicle codes created since the adoption of the ISO 3166 standard match the two- or three-letter ISO codes. In Europe, the requirements regarding the content, shape, and size of country codes on license plates are established by the Vienna Convention on Road Traffic.
| Code | Country | Since Year |
|---|---|---|
| A | Austria | 1910 |
| AFG | Afghanistan | 1971 |
| AL | Albania | 1934 |
| AM | Armenia | 1992 |
| AND | Andorra | 1957 |
| AUS | Australia | 1954 |
| AZ | Azerbaijan | 1993 |
| B | Belgium | 1910 |
| BD | Bangladesh | 1978 |
| BDS | Barbados | 1956 |
| BF | Burkina Faso | 1990 |
| BG | Bulgaria | 1910 |
| BH | Belize | 1938 |
| BIH | Bosnia and Herzegovina | 1993 |
| BOL | Bolivia | 1967 |
| BR | Brazil | 1930 |
| BRN | Bahrain | 1954 |
| BRU | Brunei | 1956 |
| BS | Bahamas | 1950 |
| BUR | Myanmar | 1956 |
| BW | Botswana | 2003 |
| BY | Belarus | 1992 (2004) |
| C | Cuba | 1930 |
| CAM | Cameroon | 1952 |
| CDN | Canada | 1956 |
| CH | Switzerland | 1911 |
| CI | Ivory Coast | 1961 |
| CL | Sri Lanka | 1961 |
| CO | Colombia | 1952 |
| CR | Costa Rica | 1956 |
| CY | Cyprus | 1932 |
| CZ | Czechia | 1993 |
| D | Germany | 1910 |
| DK | Denmark | 1914 |
| DOM | Dominican Republic | 1952 |
| DY | Benin | 1910 |
| DZ | Algeria | 1962 |
| E | Spain | 1910 |
| EAK | Kenya | 1938 |
| EAT | Tanzania | 1938 |
| EAU | Uganda | 1938 |
| HC | Ecuador | 1962 |
| ES | El Salvador | 1978 |
| EST | Estonia | 1993 |
| ET | Egypt | 1927 |
| F | France | 1910 |
| FIN | Finland | 1993 |
| FL | Liechtenstein | 1923 |
| G | Gabon | 1974 |
| GB | United Kingdom | 1910 |
| GCA | Guatemala | 1956 |
| GE | Georgia | 1992 |
| GH | Ghana | 1959 |
| GR | Greece | 1913 |
| GUY | Guyana | 1972 |
| H | Hungary | 1910 |
| IND | India | 1947 |
| IR | Iran | 1936 |
| IRL | Ireland | 1962 |
| IRQ | Iraq | 1930 |
| IS | Iceland | 1936 |
| J | Japan | 1964 |
| JA | Jamaica | 1932 |
| K | Cambodia | 1956 |
| KS | Kyrgyzstan | 1992 |
| KSA | Saudi Arabia | 1973 |
| KWT | Kuwait | 1954 |
| KZ | Kazakhstan | 1992 |
| L | Luxembourg | 1911 |
| LAO | Laos | 1959 |
| LAR | Libya | 1972 |
| LB | Liberia | 1967 |
| LS | Lesotho | 1967 |
| LT | Lithuania | 1992 |
| LV | Latvia | 1992 |
| M | Malta | 1966 |
| MA | Morocco | 1924 |
| MAL | Malaysia | 1967 |
| MC | Monaco | 1910 |
| MD | Moldova | 1992 |
| MEX | Mexico | 1952 |
| MK | North Macedonia | 1992 |
| MNE | Montenegro | 2006 |
| MOC | Mozambique | 1975 |
| MS | Mauritius | 1938 |
| MW | Malawi | 1965 |
| N | Norway | 1922 |
| NAM | Namibia | 1990 |
| NAU | Nauru | 1968 |
| NEP | Nepal | 1970 |
| NIC | Nicaragua | 1952 |
| NL | Netherlands | 1910 |
| NZ | New Zealand | 1958 |
| P | Portugal | 1910 |
| PA | Panama | 1952 |
| PE | Peru | 1937 |
| PL | Poland | 1921 |
| PY | Paraguay | 1952 |
| RA | Argentina | 1927 |
| RB | Botswana | 1966 |
| RC | Republic of China | 1932 |
| RCA | Central African Republic | 1962 |
| RCB | Republic of Congo | 1962 |
| RCH | Chile | 1930 |
| RG | Guinea | 1972 |
| RH | Haiti | 1952 |
| RI | Indonesia | 1955 |
| RL | Lebanon | 1952 |
| RM | Madagascar | 1962 |
| RMM | Mali | 1962 |
| RN | Niger | 1977 |
| RO | Romania | 1981 |
| ROK | South Korea | 1971 |
| RP | Philippines | 1975 |
| RSM | San Marino | 1932 |
| RUS | Russia | 1992 |
| RWA | Rwanda | 1964 |
| S | Sweden | 1911 |
| SD | Swaziland | 1935 |
| SGP | Singapore | 1952 |
| SK | Slovakia | 1993 |
| SLO | Slovenia | 1992 |
| SN | Senegal | 1962 |
| SO | Somalia | 1974 |
| SRB | Serbia | 2006 |
| SUD | Sudan | 1963 |
| SY | Seychelles | 1938 |
| SYR | Syria | 1952 |
| T | Thailand | 1955 |
| TCH, TD | Chad | 1973 |
| TG | Togo | 1973 |
| TJ | Tajikistan | 1992 |
| TM | Turkmenistan | 1992 |
| TN | Tunisia | 1957 |
| TR | Turkey | 1935 |
| TT | Trinidad and Tobago | 1964 |
| UA | Ukraine | 1992 |
| USA | United States of America | 1952 |
| UY | Uruguay | 2012 |
| UZ | Uzbekistan | 1992 |
| V | Vatican | 1931 |
| VN | Vietnam | 1953 |
| WAG | Gambia | 1932 |
| WD | Dominica | 1954 |
| WG | Grenada | 1932 |
| WL | Saint Lucia | 1932 |
| WS | Samoa | 1962 |
| WV | Saint Vincent and the Grenadines | 1932 |
| Z | Zambia | 1964 |
| ZA | South Africa | 1936 |
| ZW | Zimbabwe | 1980 |