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Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...
Area code 504 as of after 2007. Area code 504 as of 1947–1957. Area code 504 is a telephone area code that covers greater New Orleans, Louisiana. Besides New Orleans itself (Orleans Parish), it includes all of St. Bernard and Plaquemines parishes and most of Jefferson Parish. 504 was one of the original area codes created in 1947
291 No longer used — formerly Comparative religion. 292 Classical religion (Greek and Roman religion) 293 Germanic religion. 294 Religions of Indic origin. 295 Zoroastrianism (Mazdaism, Parseeism) 296 Judaism. 297 Islam, Bábism, and BaháΚΌí Faith. 298 No longer used — formerly Mormonism.
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.
The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World War II period. The program had the goal of speeding the connecting times for long-distance calling by eliminating intermediary telephone operators.
Area code 616. Coordinates: 42.75°N 85.75°W. Map of area code 616 in Michigan. Area code 616 is the telephone area code in the North American Numbering Plan (NANP) for Grand Rapids, Michigan and all or part of five surrounding counties. The numbering plan area also includes the towns of Holland, Greenville, and Grand Haven.
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 ...
Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.[1]