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Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
The Maidenhead Locator System (a.k.a. QTH Locator and IARU Locator) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates, which replaced the deprecated QRA locator, which was limited to European contacts. [1] Its purpose is to be concise, accurate, and robust in the face of interference and ...
Open Location Code. The Open Location Code ( OLC) is a geocode based in a system of regular grids for identifying an area anywhere on the Earth. [1] It was developed at Google's Zürich engineering office, [2] and released late October 2014. [3] Location codes created by the OLC system are referred to as " plus codes ".
1993: split to create 905. 2001: overlaid by 647. 2013: overlaid by 437. 2025: overlaid by 942. area code 387 is reserved as a fifth code for the region. 417. Missouri ( Springfield, Joplin, Branson, Lamar, Lebanon, and most of southwestern Missouri) 1950. created from parts of the area codes 314 and 816.
This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan.. All NPAs within Illinois. 217/447: Central Illinois, including the region running west from the Illinois-Indiana border through Danville, Effingham, Champaign–Urbana, Decatur, Springfield, Quincy until Illinois' western border with Missouri and Iowa.
List of Wisconsin area codes. The U.S. state of Wisconsin is serviced in five distinct numbering plan areas (NPAs) with the following area codes of the North American Numbering Plan (NANP). Area codes 414 and 715 were among the original North American area codes assigned in 1947. NPA. Region.
The area codes in the U.S. State of New Jersey are a component of the North American Numbering Plan . 201: Northeastern New Jersey, primarily Bergen County and Hudson County. 551: Overlays area code 201. 609: Trenton, Lawrenceville, Princeton, Medford, Atlantic City, Barnegat, Wildwood, Ocean City, Burlington, Cape May. 640: Overlays 609.
NPA Year Current region 212: 1947 New York City: Manhattan only; overlays with 332, 646, and 917 : 315: 1947 Syracuse, Utica, Watertown, and north central New York; overlaid by 680.