List of parties to the Partial Nuclear Test Ban Treaty



The list of parties to the Partial Test Ban Treaty encompasses the states who have signed and ratified or acceded to the international agreement prohibiting all test detonations of nuclear weapons except underground.

On August 5, 1963, the Partial Test Ban Treaty (PTBT) was opened for signature. The principal state authors (the Soviet Union, the United Kingdom, and the United States) signed the treaty that day. The PTBT came into force and closed for signature on October 10, 1963 with the ratification by the three principal states. Since then, states that did not sign the treaty can now only accede or succeed to it.

As of February 2013, 126 active states have ratified or acceded to the treaty, most recently Montenegro on 3 June, 2006. A further 10 states have signed but not ratified the treaty. The instrument of ratification, accession, or succession is deposited at the respective capitals of the principal states of the treaty: Moscow, London, and Washington, D.C..

Ratified or acceded states
Multiple dates indicate the different days in which states submitted their signature or deposition, which varied by location. This location is noted by: (L) for London, (M) for Moscow, and (W) for Washington.

Non-signatory states
The remaining UN member states, which have not signed the treaty, are:


 * 🇦🇱 Albania
 * 🇦🇩 Andorra
 * 🇦🇴 Angola
 * 🇦🇿 Azerbaijan
 * 🇧🇭 Bahrain
 * 🇧🇧 Barbados
 * 🇧🇿 Belize
 * Brunei
 * 🇰🇭 Cambodia
 * 🇨🇳 China
 * 🇰🇲 Comoros
 * Republic of the Congo
 * 🇨🇺 Cuba
 * 🇩🇯 Djibouti
 * 🇩🇲 Dominica


 * 🇪🇷 Eritrea
 * 🇪🇪 Estonia
 * 🇫🇷 France
 * Georgia
 * 🇬🇩 Grenada
 * 🇬🇳 Guinea
 * 🇬🇾 Guyana
 * 🇰🇿 Kazakhstan
 * 🇰🇮 Kiribati
 * 🇰🇵 North Korea
 * 🇰🇬 Kyrgyzstan
 * 🇱🇻 Latvia
 * 🇱🇸 Lesotho
 * 🇱🇮 Liechtenstein
 * 🇱🇹 Lithuania


 * 🇲🇰 Macedonia
 * 🇲🇻 Maldives
 * 🇲🇭 Marshall Islands
 * Federated States of Micronesia
 * 🇲🇩 Moldova
 * 🇲🇨 Monaco
 * 🇲🇿 Mozambique
 * 🇳🇦 Namibia
 * 🇳🇷 Nauru
 * 🇴🇲 Oman
 * 🇵🇼 Palau
 * 🇶🇦 Qatar
 * 🇰🇳 Saint Kitts and Nevis
 * 🇱🇨 Saint Lucia


 * 🇻🇨 Saint Vincent and the Grenadines
 * São Tomé and Príncipe
 * 🇸🇦 Saudi Arabia
 * 🇸🇧 Solomon Islands
 * 🇸🇸 South Sudan
 * 🇹🇯 Tajikistan
 * Timor-Leste
 * 🇹🇲 Turkmenistan
 * 🇹🇻 Tuvalu
 * 🇦🇪 United Arab Emirates
 * 🇺🇿 Uzbekistan
 * 🇻🇺 Vanuatu
 * Vietnam
 * 🇿🇼 Zimbabwe