The 44 nations, each possessing various degrees of nuclear capability, that must ratify the Comprehensive Test Ban Treaty for it to take effect:

Algeria, Argentina, Australia, Austria, Bangladesh, Belgium, Brazil, Britain, Bulgaria, Canada, Chile, China, Colombia, Congo, Egypt, Finland, France, Germany, Hungary, India, Indonesia, Iran, Israel, Italy, Japan, Mexico, Netherlands, North Korea, Norway, Pakistan, Peru, Poland, Romania, Russia, Slovakia, South Africa, South Korea, Spain, Sweden, Switzerland, Turkey, Ukraine, United States and Vietnam. 

The 26 nations among the 44 that have ratified the treaty: 

Argentina, Australia, Austria, Belgium, Brazil, Britain, Bulgaria, Canada, Finland, France, Germany, Hungary, Italy, Japan, Mexico, Netherlands, Norway, Peru, Poland, Romania, Slovakia, South Africa, South Korea, Spain, Sweden and Switzerland. 

The 15 nations among the 44 that have signed but not yet ratified the treaty: 

Algeria, Bangladesh, Chile, China, Colombia, Congo, Egypt, Indonesia, Iran, Israel, Russia, Turkey, Ukraine, United States and Vietnam. 

The three nations among the 44 that have neither signed nor ratified the treaty: 

India, Pakistan, North Korea.