Wide 3249

Membership Information for: Comprehensive Nuclear Test Ban Treaty

Signed: 1996-09-10; Entered into force: 2599-01-01; Terminated:
Source for membership data: http://www.ctbto.org/the-treaty/status-of-signature-and-ratification/
Last downloaded: 2022-01-01; Last known update: 2016-09-21
The following is data currently in the IEA database for agreement actions. Agreement actions (signature, ratification, entry into force) can change frequently. The IEA Database Project updates this data approximately once a year and tries to ensure it is current and accurate. You are encouraged to visit the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization website to look for the most accurate and up-to-date membership information. If you have questions about this data or notice inaccuracies, please contact the Project Director.
Country199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019202020212022
Ratifiers182651698997107119125136140147150152154156160162163165165166167167169169
Members (agreement in force)00000000.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.5
Afghanistan000000011111111111111111111
Albania000000011111111111111111111
Algeria000000011111111111111111111
Andorra000000000011111111111111111
Angola000000000000000000011111111
Antigua and Barbuda000000000011111111111111111
Argentina001111111111111111111111111
Armenia000000000011111111111111111
Australia001111111111111111111111111
Austria001111111111111111111111111
Azerbaijan000111111111111111111111111
Bahamas000000000001111111111111111
Bahrain000000001111111111111111111
Bangladesh000011111111111111111111111
Barbados000000000000111111111111111
Belarus000011111111111111111111111
Belgium000111111111111111111111111
Belize000000001111111111111111111
Benin000001111111111111111111111
Bolivia000111111111111111111111111
Bosnia and Herzegovina000000000011111111111111111
Botswana000000111111111111111111111
Brazil001111111111111111111111111
Brunei Darussalam000000000000000001111111111
Bulgaria000111111111111111111111111
Burkina Faso000000111111111111111111111
Burundi000000000000111111111111111
Cambodia000011111111111111111111111
Cameroon000000000011111111111111111
Canada001111111111111111111111111
Cape Verde000000000011111111111111111
Central African Republic000000000000001111111111111
Chad000000000000000001111111111
Chile000011111111111111111111111
China000000000000000000000000000
Colombia000000000000111111111111111
Comoros000000000000000000000000011
Congo, Democratic Republic of000000001111111111111111111
Congo, Republic of the000000000000000000111111111
Cook Islands000000000111111111111111111
Costa Rica000001111111111111111111111
Cote d'Ivoire000000011111111111111111111
Croatia000001111111111111111111111
Cuba000000000000000000000000011
Cyprus000000011111111111111111111
Czechia011111111111111111111111111
Denmark001111111111111111111111111
Djibouti000000000111111111111111111
Dominican Republic000000000001111111111111111
Ecuador000001111111111111111111111
Egypt000000000000000000000000000
El Salvador001111111111111111111111111
Equatorial Guinea000000000000000000000000000
Eritrea000000011111111111111111111
Estonia000111111111111111111111111
Eswatini000000000000000000001111111
Ethiopia000000000011111111111111111
Fiji111111111111111111111111111
Finland000111111111111111111111111
France001111111111111111111111111
Gabon000011111111111111111111111
Gambia000000000000000000000000000
Georgia000000111111111111111111111
Germany001111111111111111111111111
Ghana000000000000000111111111111
Greece000111111111111111111111111
Grenada001111111111111111111111111
Guatemala000000000000000011111111111
Guinea000000000000000111111111111
Guinea-Bissau000000000000000001111111111
Guyana000001111111111111111111111
Haiti000000000111111111111111111
Holy See000001111111111111111111111
Honduras000000011111111111111111111
Hungary000111111111111111111111111
Iceland000011111111111111111111111
Indonesia000000000000000011111111111
Iran000000000000000000000000000
Iraq000000000000000001111111111
Ireland000111111111111111111111111
Israel000000000000000000000000000
Italy000111111111111111111111111
Jamaica000001111111111111111111111
Japan011111111111111111111111111
Jordan001111111111111111111111111
Kazakhstan000000111111111111111111111
Kenya000011111111111111111111111
Kiribati000011111111111111111111111
Korea, Republic of000111111111111111111111111
Kuwait000000011111111111111111111
Kyrgyzstan000000011111111111111111111
Laos000011111111111111111111111
Latvia000001111111111111111111111
Lebanon000000000000111111111111111
Lesotho000111111111111111111111111
Liberia000000000000011111111111111
Libya000000001111111111111111111
Liechtenstein000000001111111111111111111
Lithuania000011111111111111111111111
Luxembourg000111111111111111111111111
Madagascar000000000111111111111111111
Malawi000000000000111111111111111
Malaysia000000000000111111111111111
Maldives000011111111111111111111111
Mali000111111111111111111111111
Malta000001111111111111111111111
Marshall Islands000000000000011111111111111
Mauritania000000011111111111111111111
Mexico000111111111111111111111111
Micronesia011111111111111111111111111
Moldova000000000001111111111111111
Monaco001111111111111111111111111
Mongolia011111111111111111111111111
Montenegro000000000011111111111111111
Morocco000011111111111111111111111
Mozambique000000000000111111111111111
Myanmar000000000000000000001111111
Namibia000001111111111111111111111
Nauru000001111111111111111111111
Nepal000000000000000000000000000
Netherlands000111111111111111111111111
New Zealand000111111111111111111111111
Nicaragua000011111111111111111111111
Niger000000111111111111111111111
Nigeria000001111111111111111111111
Niue000000000000000000111111111
North Macedonia000011111111111111111111111
Norway000111111111111111111111111
Oman000000011111111111111111111
Palau000000000001111111111111111
Panama000111111111111111111111111
Papua New Guinea000000000000000000000000000
Paraguay000001111111111111111111111
Peru011111111111111111111111111
Philippines000001111111111111111111111
Poland000111111111111111111111111
Portugal000011111111111111111111111
Qatar011111111111111111111111111
Romania000111111111111111111111111
Russian Federation000011111111111111111111111
Rwanda000000001111111111111111111
Saint Kitts and Nevis000000000111111111111111111
Saint Lucia000001111111111111111111111
Saint Vincent and the Grenadines000000000000011111111111111
Samoa000000111111111111111111111
San Marino000000111111111111111111111
Sao Tome and Principe000000000000000000000000000
Senegal000111111111111111111111111
Serbia000000001111111111111111111
Seychelles000000001111111111111111111
Sierra Leone000001111111111111111111111
Singapore000001111111111111111111111
Slovakia001111111111111111111111111
Slovenia000111111111111111111111111
Solomon Islands000000000000000000000000000
South Africa000111111111111111111111111
Spain001111111111111111111111111
Sri Lanka000000000000000000000000000
Sudan000000001111111111111111111
Suriname000000000011111111111111111
Sweden001111111111111111111111111
Switzerland000111111111111111111111111
Tajikistan001111111111111111111111111
Tanzania000000001111111111111111111
Thailand000000000000000000000011111
Timor-Leste000000000000000000000000000
Togo000000001111111111111111111
Trinidad and Tobago000000000000001111111111111
Tunisia000000001111111111111111111
Turkmenistan001111111111111111111111111
Tuvalu000000000000000000000000000
Türkiye000011111111111111111111111
Uganda000001111111111111111111111
Ukraine000001111111111111111111111
United Arab Emirates000011111111111111111111111
United Kingdom001111111111111111111111111
United States000000000000000000000000000
Uruguay000001111111111111111111111
Uzbekistan011111111111111111111111111
Vanuatu000000000111111111111111111
Venezuela000000111111111111111111111
Viet Nam000000000011111111111111111
Yemen000000000000000000000000000
Zambia000000000011111111111111111
Zimbabwe000000000000000000000001111
Members (agreement in force)00000000.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.5
Ratifiers182651698997107119125136140147150152154156160162163165165166167167169169

Membership status is coded as follows:

  • Countries listed are those that have signed and/or ratified the IEA in question.
  • Legend:
    • 0 (pink): Signer: country signed but did not ratify IEA. Status is 0 for all countries until IEA enters into force.
    • 1 (yellow): Ratifier: country signed and ratified IEA but IEA had not entered into force. Status is 1 for countries that have ratified until IEA enters into force.
    • 2 (green):Member: country signed and ratified IEA and IEA has entered into force for that country.
    • Ratifier row is count of states that have ratified.
    • Membership row is count (not sum) of members.
  • If membership data source lacks entry into force date, membership is inferred from year of ratification, if that year occurs after entry into force year of IEA.
  • Status can return to 0 if an IEA is terminated or if a country withdraws. In rare cases, countries later re-join IEAs, with their status returning to 2.
  • Action tab: membership by Action, Country, Year, Month, Day.
  • Wide tab: Annual status data (countries as rows, years as columns).
  • Long tab: Annual status data in Stata format (Country, Year, Membership Status).