| Year |
First Day |
Country |
Scott # |
Agency |
Conference |
Conference Dates |
Conference City |
| 1945 | 25-Apr | United States | 928 | UN | UN Conference on International Organization | 25 Apr-26 Jun 1945 | San Francisco |
 |
| 1946 | 10-Oct | Egypt | C38 | ICAO | PICAO Middle East Regional Air Navigation Meeting | 1-18 Oct 1946 | Cairo |
 |
| 1946 | 19-Nov | France | 572 | UNESCO | 1st UNESCO General Conference | 19 Nov-10 Dec 1946 | Paris |
 |
| 1947 | 12-Jan | Venezuela | 395, C228-231 | WHO | 12th Pan American Sanitary Conference | 11-24 Jan 1947 | Caracas |
 |
| 1947 | 7-May | France | 581-584, C22 | UPU | 12th Universal Postal Congress | 7 May-5 Jul 1947 | Paris |
  |
| 1947 | 16-May | United States | 17T1-17T3 | ITU | World Telecommunications Conferences | 16 May-2 Oct 1947 | Atlantic City |
 |
| 1947 | 24-Nov | Philippines | 516-518, 516a-518a | ECAFE | 2nd Session, ECAFE | 24 Nov-6 Dec 1947 | Baguio |
 |
 |
 |
 |
| 1948 | 23-Feb | Philippines | 522-524, C67 | FAO | 1st FAO Far East Regional Conference | 23 Feb-13 Mar 1948 | Baguio |
 |
 |
| 1948 | 21-Sep | France | 605-606 | UN | 3rd UN General Assembly | 21 Sep-12 Dec 1948 | Paris |
 |
| 1948 | 23-Nov | Lebanon | 220-224, C148-149 | UNESCO | 3rd UNESCO General Conference | 17 Nov-11 Dec 1948 | Beirut |
 |
 |
 |
 |
 |
| 1949 | 29-Apr | Uruguay | 579-580 | ILO | 4th ILO Regional Conference for the Americas | 25 Apr-10 May 1949 | Montevideo |
 |
| 1949 | 13-Jun | France | 625-628, C28 | ITU | International Telephone and Telegraph Conference | 18 May-4 Aug 1949 | Paris |
  |
| 1949 | 13-Jun | Italy | 522 | WHO | 2nd World Health Assembly | 13 Jun-2 Jul 1949 | Rome |
 |
| 1949 | 15-Jun | Finland | 281-182 | FAO | 3rd World Forestry Congress | 7-20 Jul 1949 | Helsinki |
 |
