Status of Signature and Ratification

Total States196Latest State Signatory
Total Signed185Cuba
Total Ratified17004-FEB-2021
Latest Ratifying State
Not Signed11Comoros
Not Ratified2619-FEB-2021

Status of signature and ratification

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States, whose signature and ratification are required for the Treaty to enter into force

All States, which are current members of the Preparatory Commission for the CTBTO

All States which have signed and ratified the Comprehensive Nuclear-Test-Ban Treaty (CTBT)

All States which have neither signed nor ratified the Comprehensive Nuclear-Test-Ban Treaty (CTBT)

By Region

* Signature and Ratification required for Treaty to enter into force

StatesSignatureRatification
Afghanistan24-SEP-200324-SEP-2003
Albania27-SEP-199623-APR-2003
Algeria*15-OCT-199611-JUL-2003
Andorra24-SEP-199612-JUL-2006
Angola27-SEP-199620-MAR-2015
Antigua and Barbuda16-APR-199711-JAN-2006
Argentina*24-SEP-199604-DEC-1998
Armenia01-OCT-199612-JUL-2006
Australia*24-SEP-199609-JUL-1998
Austria*24-SEP-199613-MAR-1998
Azerbaijan28-JUL-199702-FEB-1999
Bahamas04-FEB-200530-NOV-2007
Bahrain24-SEP-199612-APR-2004
Bangladesh*24-OCT-199608-MAR-2000
Barbados14-JAN-200814-JAN-2008
Belarus24-SEP-199613-SEP-2000
Belgium*24-SEP-199629-JUN-1999
Belize14-NOV-200126-MAR-2004
Benin27-SEP-199606-MAR-2001
Bhutan  
Bolivia24-SEP-199604-OCT-1999
Bosnia and Herzegovina24-SEP-199626-OCT-2006
Botswana16-SEP-200228-OCT-2002
Brazil*24-SEP-199624-JUL-1998
Brunei Darussalam22-JAN-199710-JAN-2013
Bulgaria*24-SEP-199629-SEP-1999
Burkina Faso27-SEP-199617-APR-2002
Burundi24-SEP-199624-SEP-2008
Cabo Verde01-OCT-199601-MAR-2006
Cambodia26-SEP-199610-NOV-2000
Cameroon16-NOV-200106-FEB-2006
Canada*24-SEP-199618-DEC-1998
Côte d'Ivoire25-SEP-199611-MAR-2003
Central African Republic19-DEC-200126-MAY-2010
Chad08-OCT-199608-FEB-2013
Chile*24-SEP-199612-JUL-2000
China*24-SEP-1996 
Colombia*24-SEP-199629-JAN-2008
Comoros12-DEC-199619-FEB-2021
Congo11-FEB-199702-SEP-2014
Cook Islands05-DEC-199706-SEP-2005
Costa Rica24-SEP-199625-SEP-2001
Croatia24-SEP-199602-MAR-2001
Cuba04-FEB-202104-FEB-2021
Cyprus24-SEP-199618-JUL-2003
Czech Republic12-NOV-199611-SEP-1997
Democratic People's Republic of Korea*  
Democratic Republic of the Congo*04-OCT-199628-SEP-2004
Denmark24-SEP-199621-DEC-1998
Djibouti21-OCT-199615-JUL-2005
Dominica  
Dominican Republic03-OCT-199604-SEP-2007
Ecuador24-SEP-199612-NOV-2001
Egypt*14-OCT-1996 
El Salvador24-SEP-199611-SEP-1998
Equatorial Guinea09-OCT-1996 
Eritrea11-NOV-200311-NOV-2003
Estonia20-NOV-199613-AUG-1999
Eswatini24-SEP-199621-SEP-2016
Ethiopia25-SEP-199608-AUG-2006
Fiji24-SEP-199610-OCT-1996
Finland*24-SEP-199615-JAN-1999
France*24-SEP-199606-APR-1998
Gabon07-OCT-199620-SEP-2000
Gambia09-APR-2003 
Georgia24-SEP-199627-SEP-2002
Germany*24-SEP-199620-AUG-1998
Ghana03-OCT-199614-JUN-2011
Greece24-SEP-199621-APR-1999
Grenada10-OCT-199619-AUG-1998
Guatemala20-SEP-199912-JAN-2012
Guinea03-OCT-199620-SEP-2011
Guinea-Bissau11-APR-199724-SEP-2013
Guyana07-SEP-200007-MAR-2001
Haiti24-SEP-199601-DEC-2005
Holy See24-SEP-199618-JUL-2001
Honduras25-SEP-199630-OCT-2003
Hungary*25-SEP-199613-JUL-1999
Iceland24-SEP-199626-JUN-2000
India*  
Indonesia*24-SEP-199606-FEB-2012
Iran (Islamic Republic of)*24-SEP-1996 
Iraq19-AUG-200826-SEP-2013
Ireland24-SEP-199615-JUL-1999
Israel*25-SEP-1996 
Italy*24-SEP-199601-FEB-1999
Jamaica11-NOV-199613-NOV-2001
Japan*24-SEP-199608-JUL-1997
Jordan26-SEP-199625-AUG-1998
Kazakhstan30-SEP-199614-MAY-2002
Kenya14-NOV-199630-NOV-2000
Kiribati07-SEP-200007-SEP-2000
Kuwait24-SEP-199606-MAY-2003
Kyrgyzstan08-OCT-199602-OCT-2003
Lao People's Democratic Republic30-JUL-199705-OCT-2000
Latvia24-SEP-199620-NOV-2001
Lebanon16-SEP-200521-NOV-2008
Lesotho30-SEP-199614-SEP-1999
Liberia01-OCT-199617-AUG-2009
Libya13-NOV-200106-JAN-2004
Liechtenstein27-SEP-199621-SEP-2004
Lithuania07-OCT-199607-FEB-2000
Luxembourg24-SEP-199626-MAY-1999
Madagascar09-OCT-199615-SEP-2005
Malawi09-OCT-199621-NOV-2008
Malaysia23-JUL-199817-JAN-2008
Maldives01-OCT-199707-SEP-2000
Mali18-FEB-199704-AUG-1999
Malta24-SEP-199623-JUL-2001
Marshall Islands24-SEP-199628-OCT-2009
Mauritania24-SEP-199630-APR-2003
Mauritius  
Mexico*24-SEP-199605-OCT-1999
Micronesia, Federated States of24-SEP-199625-JUL-1997
Monaco01-OCT-199618-DEC-1998
Mongolia01-OCT-199608-AUG-1997
Montenegro23-OCT-200623-OCT-2006
Morocco24-SEP-199617-APR-2000
Mozambique26-SEP-199604-NOV-2008
Myanmar25-NOV-199621-SEP-2016
Namibia24-SEP-199629-JUN-2001
Nauru08-SEP-200012-NOV-2001
Nepal08-OCT-1996 
Netherlands*24-SEP-199623-MAR-1999
New Zealand27-SEP-199619-MAR-1999
Nicaragua24-SEP-199605-DEC-2000
Niger03-OCT-199609-SEP-2002
Nigeria08-SEP-200027-SEP-2001
Niue09-APR-201204-MAR-2014
North Macedonia29-OCT-199814-MAR-2000
Norway*24-SEP-199615-JUL-1999
Oman23-SEP-199913-JUN-2003
Pakistan*  
Palau12-AUG-200301-AUG-2007
Panama24-SEP-199623-MAR-1999
Papua New Guinea25-SEP-1996 
Paraguay25-SEP-199604-OCT-2001
Peru*25-SEP-199612-NOV-1997
Philippines24-SEP-199623-FEB-2001
Poland*24-SEP-199625-MAY-1999
Portugal24-SEP-199626-JUN-2000
Qatar24-SEP-199603-MAR-1997
Republic of Korea*24-SEP-199624-SEP-1999
Republic of Moldova24-SEP-199716-JAN-2007
Romania*24-SEP-199605-OCT-1999
Russian Federation*24-SEP-199630-JUN-2000
Rwanda30-NOV-200430-NOV-2004
Saint Kitts and Nevis23-MAR-200427-APR-2005
Saint Lucia04-OCT-199605-APR-2001
Saint Vincent and the Grenadines02-JUL-200923-SEP-2009
Samoa09-OCT-199627-SEP-2002
San Marino07-OCT-199612-MAR-2002
Sao Tome and Principe26-SEP-1996 
Saudi Arabia  
Senegal26-SEP-199609-JUN-1999
Serbia08-JUN-200119-MAY-2004
Seychelles24-SEP-199613-APR-2004
Sierra Leone08-SEP-200017-SEP-2001
Singapore14-JAN-199910-NOV-2001
Slovakia*30-SEP-199603-MAR-1998
Slovenia24-SEP-199631-AUG-1999
Solomon Islands03-OCT-1996 
Somalia  
South Africa*24-SEP-199630-MAR-1999
South Sudan  
Spain*24-SEP-199631-JUL-1998
Sri Lanka24-OCT-1996 
Sudan10-JUN-200410-JUN-2004
Suriname14-JAN-199707-FEB-2006
Sweden*24-SEP-199602-DEC-1998
Switzerland*24-SEP-199601-OCT-1999
Syrian Arab Republic  
Tajikistan07-OCT-199610-JUN-1998
Thailand12-NOV-199625-SEP-2018
Timor-Leste26-SEP-2008 
Togo02-OCT-199602-JUL-2004
Tonga  
Trinidad & Tobago08-OCT-200926-MAY-2010
Tunisia16-OCT-199623-SEP-2004
Turkey*24-SEP-199616-FEB-2000
Turkmenistan24-SEP-199620-FEB-1998
Tuvalu25-SEP-2018 
Uganda07-NOV-199614-MAR-2001
Ukraine*27-SEP-199623-FEB-2001
United Arab Emirates25-SEP-199618-SEP-2000
United Kingdom of Great Britain and Northern Ireland*24-SEP-199606-APR-1998
United Republic of Tanzania30-SEP-200430-SEP-2004
United States of America*24-SEP-1996 
Uruguay24-SEP-199621-SEP-2001
Uzbekistan03-OCT-199629-MAY-1997
Vanuatu24-SEP-199616-SEP-2005
Venezuela (Bolivarian Republic of)03-OCT-199613-MAY-2002
Viet Nam*24-SEP-199610-MAR-2006
Yemen30-SEP-1996 
Zambia03-DEC-199623-FEB-2006
Zimbabwe13-OCT-199913-FEB-2019