Except...

(From WP)

India

In 1998, India said it would only sign the treaty if the United States presented a schedule for eliminating its nuclear stockpile, a condition the United States rejected.[18]

Israel

In 2016, Israeli Prime Minister Benjamin Netanyahu said that its ratification was dependent upon "the regional context and the appropriate timing".[19]

United States

The United States has signed the CTBT, but not ratified it; there is ongoing debate whether to ratify the CTBT.

https://en.wikipedia.org/wiki/List_of_parties_to_the_Compreh...