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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 ...
The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state, respectively. [1] As of July 2023, California has 38 active area codes. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra ...
Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.
Area codes in Mexico by code. Country code: 52. International call prefix: 00. Trunk Prefix: none. The telecommunication services of Mexico are provided by a division of the telephone numbering plan into groups of area codes for the following regions: [1] Codes.
Numbering plan areas and area codes since May 2001 September 1997 – May 2001 July 1988 – September 1997 October 1947 – July 1988. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), organized as four overlay complexes and a single-area code NPA.
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.
The area codes are allocated within the North American Numbering Plan (NANP). The two original area codes for Missouri in 1947 were 314 and 816. Area code 417 was split off from 816 in 1950, and the other area codes followed more than 40 years later, due to the proliferation of Cellular Phones and Pagers.
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. Milwaukee County and several outlying areas served by Milwaukee ...
This is a list of area codes in the Commonwealth of Virginia . 276 — Southwest corner of the state including Bristol, Galax, Martinsville, and Wytheville (September 1, 2001 as split from 540). 434 — South central area including Charlottesville and Lynchburg (June 1, 2001 as split from 804). 540/826 — Central and North including ...