Welcome to the beta version of the CTBTO multilingual site. If you encounter any issues or have feedback, please email us at [email protected]

Our Mission
Our Work
News and Events
Resources
Work With Us

Our Mission
Our Work
News and Events
Resources
Work With Us

Sort by

Home
Our Mission
Status of Signatures and Ratifications

text div

Status of Signature and Ratification

Annex 2 States Only

CTBT State Signatories

CTBT Ratifying States

CTBT Non-Signatories

(-) Africa
Eastern Europe
Latin America and the Caribbean
Middle East and South Asia
North America and Western Europe
South-East Asia, Pacific & Far East

Our Mission

Ending Nuclear Tests
The Treaty
The Organization
States Signatories
Article XIV Conferences
Ministerial Meetings

Our Work

Verification Regime
International Monitoring System
IMS Map
Monitoring Technologies
Station Profiles
International Data Centre
On-site Inspection
Detecting Nuclear Tests
Civil and Scientific Applications
CTBTO TeST Centre

News and Events

News
Events
Schedule of Sessions
Capacity Building and Training
Science and Technology Conferences
International Day Against Nuclear Tests

Resources

For Member States
For Researchers and Experts
For The Media
For Civil Society
Information Materials

Work With Us

Employment
Procurement

Mailing Address

CTBTO Preparatory Commission, Vienna International Centre, P.O. Box 1200, 1400 Vienna, Austria

Get in touch with us

CTBTO 2025. All rights reserved

Contact Us Accessibility Privacy Terms of Use