Arms control & security
Comprehensive Nuclear-Test-Ban Treaty
Not yet in force
This treaty hasn’t reached the number of ratifications its own text requires to take legal effect yet — signatures and early ratifications below are genuine steps toward that, not errors or missing data.
Source: UN Treaty Collection · scraped 2026-09-26
Figures below count the 193 UN member states separately from other parties to this treaty (international organizations and non-member observer states) — a treaty can have more parties than there are UN member states.
176/193
RatifiedUN member states
179 in total, incl. 3 non-UN members (Cook Islands, Holy See, Niue)
9
Signed, not ratifiedUN member states
0
WithdrawnUN member states
8
No actionUN member states
| Country | Signature | Ratification | Withdrawal | Status |
|---|---|---|---|---|
| China | 1996-09-24 | — | — | Signed, not ratified |
| Egypt | 1996-10-14 | — | — | Signed, not ratified |
| Iran | 1996-09-24 | — | — | Signed, not ratified |
| Israel | 1996-09-25 | — | — | Signed, not ratified |
| Nepal | 1996-10-08 | — | — | Signed, not ratified |
| Russian Federation | 1996-09-24 | — | — | Signed, not ratified |
| Somalia | 2023-09-08 | — | — | Signed, not ratified |
| United States of America | 1996-09-24 | — | — | Signed, not ratified |
| Yemen | 1996-09-30 | — | — | Signed, not ratified |