|
No. |
Country |
Date |
Comment |
| 1 |
Belgium |
04-04-49 |
Founding member |
| 2 |
Canada |
04-04-49 |
Founding member |
| 3 |
Denmark |
04-04-49 |
Founding member |
| 4 |
France |
04-04-49 |
Founding member |
| 5 |
Iceland |
04-04-49 |
Founding member |
| 6 |
Italy |
04-04-49 |
Founding member |
| 7 |
Luxembourg |
04-04-49 |
Founding member |
| 8 |
Netherlands |
04-04-49 |
Founding member |
| 9 |
Norway |
04-04-49 |
Founding member |
| 10 |
Portugal |
04-04-49 |
Founding member |
| 11 |
United Kingdom |
04-04-49 |
Founding member |
| 12 |
United States |
04-04-49 |
Founding member |
| 13 |
Greece |
18-02-52 |
|
| 14 |
Türkiye |
18-02-52 |
|
| 15 |
Germany |
06-05-55 |
|
| 16 |
Spain |
30-05-82 |
|
| 17 |
Czech Republic |
12-03-99 |
First former Warsaw Pact members |
| 18 |
Hungary |
12-03-99 |
First former Warsaw Pact members |
| 19 |
Poland |
12-03-99 |
First former Warsaw Pact members |
| 20 |
Bulgaria |
29-03-04 |
|
| 21 |
Estonia |
29-03-04 |
|
| 22 |
Latvia |
29-03-04 |
|
| 23 |
Lithuania |
29-03-04 |
|
| 24 |
Romania |
29-03-04 |
|
| 25 |
Slovakia |
29-03-04 |
|
| 26 |
Slovenia |
29-03-04 |
|
| 27 |
Albania |
01-04-09 |
|
| 28 |
Croatia |
01-04-09 |
|
| 29 |
Montenegro |
05-06-17 |
|
| 30 |
North Macedonia |
29-03-20 |
|
| 31 |
Finland |
04-04-23 |
|
| 32 |
Sweden |
07-03-24 |
|
|
