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,
Headquarters of the United Nations as UNICEF, have their headquarters at the UNHQ. The headquarters of the United Nations occupies a site beside the East River, on between of land purchased from the real estate developer William Zeckendorf Sr. At the time, the site was part of Turtle Bay, which was filled with slaughterhouses and tenement buildings. By the 1910s, there was also a pencil factory and a gas company building in Turtle Bay, on the site of the current UN headquarters. The development of Sutton Place and Beekman Place, north of the current UN site, came in the 1920s. A yacht club on the