| Year |
First Day |
Country |
Scott # |
Agency |
Conference |
Conference Dates |
Conference City |
| 2000 | 12-Feb | United Arab Emirates | 660 | UN | International Conference on Desertification | 12-15 Feb 2000 | Dubai |
| 2000 | 9-Apr | Brazil | 2737 | ITU | TELECOM Americas 2000 | 10-15 Apr 2000 | Rio de Janiero |
 |
| 2000 | 30-Aug | Czech Republic | 3128 | World Bank IMF | World Bank IMF Annual Meetings | 26-28 Sep 2000 | Prague |
| 2000 | 12-Sep | Mexico | 2205 | UNESCO | 2nd International Memory of the World Conference | 27-29 Sep 2000 | Colima |
 |
| 2000 | 2-Dec | Hong Hong | SS | ITU | TELECOM Asia 2000 | 4-9 Dec 2000 | Hong Kong |
 |
| 2001 | 6-Jul | Japan | 2510a | UNWTO | 14th General Assembly, World Tourism Organization | 23 Sep - 1 Oct 2001 | Osaka, Japan & Seoul, South Korea |
 |
| 2001 | 8-Jul | South Africa | 1261-1262 | UN | World Conference Against Racism | 31 Aug-7 Sep 2001 | Durban |
 |
 |
| 2001 | 18-Sep | Nicaragua | 2373-2374 | UN | 3rd Meeting of the States Party to the Ottawa Convention to Ban Landmines | 18-21 Sep 2001 | Managua |
| 2001 | 4-Oct | Australia | Stamped envelope | WHO | 6th International Congress on AIDS in Asia and the Pacific | 5-10 Oct 2001 | Melbourne |
 |
| 2001 | 29-Oct | Morocco | 909 | UN | 7th Session of the Conference of the Parties & 15th Session of Subsidary Bodies to the UN Framework Convention on Climate Change | 29 Oct-9 Nov 2001 | Marrakesh |
| 2001 | 9-Nov | Qatar | 952-953 | WTO | 4th WTO Ministerial Conference | 9-13 Nov 2001 | Doha |
 |
| 2002 | 17-Apr | South Africa | 127,612,781,281 | UN | World Summit on Sustainable Development | 26 Aug-4 Sep 2002 | Johannesburg |
| 2002 | 28-Aug | South Africa | 127,712,791,280 | UN | World Summit on Sustainable Development | 26 Aug-4 Sep 2002 | Johannesburg |
| 2002 | 23-Sep | Morocco | 923-924 | ITU | 16th ITU Plenipotentiary Conference | 23 Sep-18 Oct 2002 | Marrakech |
 |
| 2002 | 29-Oct | Chile | 1419-1411, 1412 | UN | 12th Conference of the Parties, CITES Convention | 3-15 Nov 2002 | Santiago |
 |
 |
| 2002 | 30-Oct | India | 1975-1978, 1978a | UN | 8th Conference of the Parties to the UN Framework Convention on Climate Change | 23 Oct-1 Nov 2002 | New Delhi |
 |
| 2003 | 12-May | Takjikistan | 218 | UN, UNESCO | International Forum on Fresh Water | 29 Aug-1 Sep 2003 | Dushanbe |
| 2003 | 7-Jun | Tajikistan | 221-222 | UN, UNESCO | International Forum on Fresh Water | 29 Aug-1 Sep 2003 | Dushanbe |
 |
| 2003 | 14-Aug | Russia | 6788 | UN | World Climate Change Conference | 29 Sep-3 Oct 2003 | Moscow |
| 2003 | 23-Aug | Kazakhstan | 429 | UNCTAD | International Ministerial Conference of Landlocked and Transit Developing Countries on Transit Transport Cooperation | 28-29 Aug 2003 | Almaty |
 |
| 2003 | 25-Aug | Cuba | 4326 | UN | 6th Session of the Conference of the Parties to the UN Convention to Combat Desertification & 2nd Conference for Review of the Implementation of the Convention | 25 Aug-5 Sep 2003 | Havana |
 |
| 2003 | 9-Sep | Switzerland | 10O18 | UN ITU | World Summit on the Information Society, 1st Session | 10-12 Dec 2003 | Geneva |
 |
| 2003 | 23-Sep | United Arab Emirates | Michel 733-6, BL.24 | World Bank IMF | World Bank IMF Annual Meetings | 23-24 Sep 2003 | Dubai |
 |
 |
| 2003 | 7-Nov | Hungary | 3868 | UNESCO | World Science Forum | 8-10 Nov 2003 | Budapest |
 |
| 2004 | 9-Feb | Malaysia | 961-963 | UN | 7th Conference of the Parties to the Convention on Biological Diversity and 1st Meeting of the Parties to the Cartegena Protocol on Biosafety | 9-20 Feb 2004 and 23-27 Feb 2004 | Kuala Lumpur |
 |
| 2004 | 20-Feb | Romania | 4619 | UPU | 23rd Universal Postal Congress | 14 Sep-5 Oct 2004 | Bucharest |
 |
| 2004 | 27-Jun | China | Stamped envelope | UNESCO | International Conference on Geoparks | 27-29 Jul 2004 | Beijing |
 |
| 2004 | 6-Sep | Romania | 4660-4665 | UPU | 23rd Universal Postal Congress | 15 Sep-5 Oct 2004 | Bucharest |
 |
| 2004 | | Romania | 4 postal cards | UPU | 23rd Universal Postal Congress | 14 Sep-5 Oct 2004 | Bucharest |
  |
  |
| 2004 | | Romania | 3 postal cards | UPU | 23rd Universal Postal Congress | 14 Sep-5 Oct 2004 | Bucharest |
  |
 |
| 2005 | 11-Jan | Japan | 2915 | UN | World Conference on Disaster Reduction | 18-22 Jan 2005 | Kobe |
 |
| 2005 | 7-Apr | Tunisia | 1369 | UN ITU | World Summit on the Information Society, 2nd Session | 16-18 Nov 2005 | Tunis |
| 2005 | 14-Sep | New Caledonia | 974 | WHO | 56th Session, WHO Regional Committee for Western Pacific | 19-23 Sep 2005 | Noumea |
 |
| 2005 | 30-Sep | Hungary | 3953 | UNESC O | World Science Forum | 10-12 Nov 2005 | Bupapest |
| 2005 | 16-Nov | Tunisia | Michel 1631 | UN ITU | World Summit on the Information Society, 2nd Session | 16-18 Nov 2005 | Tunis |
| 2005 | 13-Dec | Hong Kong | 2 Postal Cards | WTO | 6th WTO Ministerial Conference | 13-18 Dec 2005 | Hong Kong |
  |
  |
| 2006 | 9-Jan | Peru | 1486 | UNESCO | 8th World Symposium, Organization of World Heritage Cities | 19-23 Sep 2005 | Cusco |
 |
| 2006 | 19-Jun | Switzerland | 1245 | UN | 1st Session, UN Human Rights Council | 19 Jun 2006 | Geneva |
 |
| 2006 | 13-Sep | Singapore | 1220-1224, 1222a | World Bank IMF | World Bank IMF Annual Meetings | 19-20 Sep 2006 | Singapore |
  |
| 2006 | 27-Sep | United Arab Emirates | 841-842 | UPU | UPU Strategy Conference | 14-16 Nov 2006 | Dubai |
 |
| 2006 | 19-Oct | Kenya | 1 v | UPU | 24th Universal Postal Congress | 13 Aug-3 Sep 2008 | Nairobi |
 |
| 2006 | 6-Nov | Turkey | 3028-3029 | ITU | 17th ITU Plenipotentiary Conference ( PP-06) | 4-24 Nov 2006 | Antalya |
 |
| 2006 | 4-Dec | Hong Kong | 2 Postal Cards | ITU | Telecom World 2006 | 4-8 Dec 2006 | Hong Kong |
 |
| 2007 | | Kazakhstan | 1 v | ESCAP | 63rd Session, ESCAP | 17-23 May 2007 | Almaty |
 |