Good luck.

http://www.un.org/members/list.shtml

Afghanistan 1946

Albania 1955

Algeria 1962

Andorra 1993

Angola 1976

Antigua and Barbuda 1981

Argentina 1945

Armenia 1992

Australia 1945

Austria 1955

Azerbaijan 1992

Bahamas 1973

Bahrain 1971

Bangladesh 1974

Barbados 1966

Belarus 1945

Belgium 1945

Belize 1981

Benin 1960

Bhutan 1971

Bolivia 1945

Bosnia and Herzegovina 1992

Botswana 1966

Brazil 1945

Brunei 1984

Bulgaria 1955

Burkina Faso 1960

Burundi 1962

Cambodia 1955

Cameroon 1960

Canada 1945

Cape Verde 1975

Central African Republic 1960

Chad 1960

Chile 1945

China 1945

Colombia 1945

Comoros 1975

Congo (Brazzaville) 1960

Congo (Kinshasa) 1960

Costa Rica 1945

Côte d’Ivoire 1960

Croatia 1992

Cuba 1945

Cyprus 1960

Czech Republic 1993

Denmark 1945

Djibouti 1977

Dominica 1978

Dominican Republic 1945

East Timor 2002

Ecuador 1945

Egypt 1945

El Salvador 1945

Equatorial Guinea 1968

Eritrea 1993

Estonia 1991

Ethiopia 1945

Fiji 1970

Finland 1955

France 1945

Gabon 1960

Gambia 1965

Georgia 1992

Germany 1973

Ghana 1957

Greece 1945

Grenada 1974

Guatemala 1945

Guinea 1958

Guinea-Bissau 1974

Guyana 1966

Haiti 1945

Honduras 1945

Hungary 1955

Iceland 1946

India 1945

Indonesia 1950

Iran 1945

Iraq 1945

Ireland 1955

Israel 1949

Italy 1955

Jamaica 1962

Japan 1956

Jordan 1955

Kazakhstan 1992

Kenya 1963

Kiribati 1999

Korea, North 1991

Korea, South 1991

Kuwait 1963

Kyrgyzstan 1992

Laos 1955

Latvia 1991

Lebanon 1945

Lesotho 1966

Liberia 1945

Libya 1955

Liechtenstein 1990

Lithuania 1991

Luxembourg 1945

Macedonia 1993

Madagascar 1960

Malawi 1964

Malaysia 1957

Maldives 1965

Mali 1960

Malta 1964

Marshall Islands 1991

Mauritania 1961

Mauritius 1968

Mexico 1945

Micronesia 1991

Moldova 1992

Monaco 1993

Mongolia 1961

Montenegro 2006

Morocco 1956

Mozambique 1975

Myanmar 1948

Namibia 1990

Nauru 1999

Nepal 1955

Netherlands 1945

New Zealand 1945

Nicaragua 1945

Niger 1960

Nigeria 1960

Norway 1945

Oman 1971

Pakistan 1947

Palau 1994

Panama 1945

Papua New Guinea 1975

Paraguay 1945

Peru 1945

Philippines 1945

Poland 1945

Portugal 1955

Qatar 1971

Romania 1955

Russia 1945

Rwanda 1962

Saint Kitts and Nevis 1983

Saint Lucia 1979

Saint Vincent and the Grenadines 1980

Samoa 1976

San Marino 1992

São Tomé and Principe 1975

Saudi Arabia 1945

Senegal 1960

Serbia 2000

Seychelles 1976

Sierra Leone 1961

Singapore 1965

Slovakia 1993

Slovenia 1992

Solomon Islands 1978

Somalia 1960

South Africa 1945

Spain 1955

Sri Lanka 1955

Sudan 1956

Suriname 1975

Swaziland 1968

Sweden 1946

Switzerland 2002

Syria 1945

Tajikistan 1992

Tanzania 1961

Thailand 1946

Togo 1960

Tonga 1999

Trinidad and Tobago 1962

Tunisia 1956

Turkey 1945

Turkmenistan 1992

Tuvalu 2000

Uganda 1962

Ukraine 1945

United Arab Emirates 1971

United Kingdom 1945

United States 1945

Uruguay 1945

Uzbekistan 1992

Vanuatu 1981

Venezuela 1945

Vietnam 1977

Yemen 1947

Zambia 1964

Zimbabwe 1980

You will get all the info you need.

Doesn’t have the list, but it contains links to the list.

this seems like a good one