The Treaty on the Prohibition of Nuclear Weapons has been signed by 50 nations.
3 nations (Guyana, Holy See, Thailand) have already ratified it.
Once 50 nations have ratified or acceded to it, it will enter into force.
Here is the list of supporting nations:
| STATE | SIGNED | RATIFIED |
| Guyana | 20/09/17 | 20/09/17 |
| Holy See | 20/09/17 | 20/09/17 |
| Thailand | 20/09/17 | 20/09/17 |
| Algeria | 20/09/17 | |
| Austria | 20/09/17 | |
| Bangladesh | 20/09/17 | |
| Brazil | 20/09/17 | |
| Cabo Verde | 20/09/17 | |
| Central African Republic | 20/09/17 | |
| Chile | 20/09/17 | |
| Comoros | 20/09/17 | |
| Congo | 20/09/17 | |
| Costa Rica | 20/09/17 | |
| Cote d’Ivoire | 20/09/17 | |
| Cuba | 20/09/17 | |
| DRC (Congo) | 20/09/17 | |
| Ecuador | 20/09/17 | |
| El Salvador | 20/09/17 | |
| Fiji | 20/09/17 | |
| Gambia | 20/09/17 | |
| Ghana | 20/09/17 | |
| Guatemala | 20/09/17 | |
| Honduras | 20/09/17 | |
| Indonesia | 20/09/17 | |
| Ireland | 20/09/17 | |
| Kiribati | 20/09/17 | |
| Libya | 20/09/17 | |
| Liechtenstein | 20/09/17 | |
| Madagascar | 20/09/17 | |
| Malawi | 20/09/17 | |
| Malaysia | 20/09/17 | |
| Mexico | 20/09/17 | |
| Nepal | 20/09/17 | |
| New Zealand | 20/09/17 | |
| Nigeria | 20/09/17 | |
| Palau | 20/09/17 | |
| Palestine | 20/09/17 | |
| Panama | 20/09/17 | |
| Paraguay | 20/09/17 | |
| Peru | 20/09/17 | |
| Philippines | 20/09/17 | |
| Samoa | 20/09/17 | |
| San Marino | 20/09/17 | |
| Sao Tome & Principe | 20/09/17 | |
| South Africa | 20/09/17 | |
| Togo | 20/09/17 | |
| Tuvalu | 20/09/17 | |
| Uruguay | 20/09/17 | |
| Vanuatu | 20/09/17 | |
| Venezuela | 20/09/17 |
