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The International Telecommunication Union (ITU), in its International Radio Regulations, divides the world into three ITU regions for the purposes of managing the global radio spectrum. Each region has its own set of frequency allocations , the main reason for defining the regions.
Region 1 (RR 5.3) XR2 Region 2 (RR 5.4) XR3 Region 3 (RR 5.5) XRY Antarctic Region (RR AP 26/5.2) XSC ex SCG Serbia and Montenegro: XSD ex Republic of the Sudan before 14 July 2011 → SDN + SSD XSP Spratly Islands: XSU ex URS Soviet Union → RUS + … XUN United Nations: XWB West Bank: XWM World Meteorological Organization: XYU
ITU Member States, as of August 2019 The five administrative regions of the ITU. Membership of ITU is open to all member states of the United Nations. There are currently 194 member states of the ITU, including all UN member states. The most recent member state to join the ITU is Republic of Palau, which became a member on 19 September 2024. [57]
The International Telecommunication Union member states are the 194 sovereign states that are members of the International Telecommunication Union (ITU) and have equal representation at its supreme decision-making body, the ITU Plenipotentiary Conference. The ITU is the world's oldest intergovernmental organization, having been founded in 1865.
While ITU prefix rules are adhered to in the context of international broadcasting, including amateur radio, it is rarer for countries to assign broadcast call signs to conventional AM, FM, and television stations with purely domestic reach; the United States, Canada, Mexico, Japan, South Korea, the Philippines, and Argentina are among those ...
ITU-terms pertaining to frequency regulation; Frequency distribution to: ITU languages: ITU RR (article) French English Spanish: Arabic: Chinese: Russian Radiocommunication services attribution (attribuer) allocation (to allocate) atribución (atribuir) 划分 распределение (распределять) 1.16 Regions or countries ...
ITU Region 1 corresponds to Europe, Russia, Africa and the Middle East. For ITU region 1, Radio Society of Great Britain's band plan will be more definitive (click on the buttons at the bottom of the page). Low Frequency (LF) (30 to 300 kHz) 2200 metres (135.7 to 137.8 kHz) Medium Frequency (MF) (0.3 to 3 MHz) 630 metres (472 to 479 kHz)
Country codes are defined by the International Telecommunication Union (ITU) in ITU-T standards E.123 and E.164. The prefixes enable international direct dialing (IDD). Country codes constitute the international telephone numbering plan. They are used only when dialing a telephone number in a country or world region other than the caller's.