Any country that has never had a nuclear weapons program and those that did but never got far enough to build devices, which basically means every country in the world except: US, Russia, UK, France, China, India, Pakistan, Israel, South Africa, and North Korea.
Note: Israel and South Africa are believed to have conducted only one shared test over the South Atlantic. So of those countries that have tested nuclear weapons, these two have tested the least number at the equivalent of half a test each.
There were 23 total nuclear weapons tested at Bikini Atoll between the years of 1946 and 1958. These nuclear weapons caused a great amount of radiation to be leaked into the surrounding areas.
The French tested their nuclear weapons in the Sahara desert (before Algeria's independence) and on the Pacific atoll of Mururoa.
Antarctica and South America, I think that may be it.
The first Soviet nuclear weapon was tested in 1949. They have never used one in combat.
1949 when the USSR tested their first atomic bomb.
No. The Netherlands have not tested or developed nuclear weapons.
The US tested nuclear weapons on its own territory including the deserts of the continental southwest US.
Both US & UK.
Every country in the world received some fallout while nuclear weapons were being tested above ground.
On May 28, 1998,First Pakistan became a nuclear power.
There were 23 total nuclear weapons tested at Bikini Atoll between the years of 1946 and 1958. These nuclear weapons caused a great amount of radiation to be leaked into the surrounding areas.
USUSSRUKFrance
North Korea has successfully tested a number of nuclear explosives. It is still unclear though if they have weaponized them. It is probable that they have succeeded in weaponization.
The French tested their nuclear weapons in the Sahara desert (before Algeria's independence) and on the Pacific atoll of Mururoa.
India and Pakistan
Currently, nine states possess nuclear weapons.United States - Tested its first nuclear weapon in 1945Russia - Tested its first nuclear weapon in 1949United Kingdom - Tested its first weapon in 1952France - Tested its first weapon in 1960China - Tested its first weapon in 1964India - Tested its first weapon in 1974Pakistan - Tested its first weapon in 1998Israel - Acquired weapons sometime between 1967-1971North Korea - Tested its first weapon in 2009Four states have ended their nuclear programsSouth Africa - de-nuclearized in 1991Belarus, Ukraine, and Kazakhstan - Returned nuclear weapons to Russia in mid-1990s.Nuclear Aspirants, but no nuclear program or weaponsGermany, Canada, Libya, Japan, Argentina, Syria. Sweden, Egypt, South Korea, Switzerland, Iraq, TaiwanFuture nuclear states?IranSee, Peter Beckman et. al, Nuclear Weapons, Nuclear States, and Terrorism (2007), 41.
Antarctica and South America, I think that may be it.