Headquarters of the United Nations be sent by courier. The United Nations Postal Administration issues stamps, which must be used on stamped mail sent from the building. For award purposes, amateur radio operators consider the UN headquarters a separate "entity" under some award programs such as DXCC. For communications, UN organizations have their own internationally recognized ITU prefix, 4U. However, only contacts made with the UN Headquarters in New York, and the ITU count as separate entities. Other UN organizations such as the World Bank count for the state or country they are located in. The UN Staff Recreation Council operates amateur radio station 4U1UN,
Brazil and the United Nations United Nations Educational, Scientific and Cultural Organization (UNESCO) headquarters in Paris, the Permanent Delegation of Brazil is headed by Ambassador Marcia Donner Abreu. Brazil joined UNESCO in 1946, and has been a member of its executive board several times, most recently 2007–09. Brazil and the United Nations Federative Republic of Brazil is a founding member of the United Nations and participates in all of its specialized agencies. Brazil is among the twenty top contributors to United Nations peacekeeping operations, and has participated in peacekeeping efforts in the Middle East, the former Belgian Congo, Cyprus, Mozambique, Angola, and more recently East