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In 1982, the DSN was designated by the Office of the Secretary of Defense (OSD) and the Joint Chiefs of Staff (JCS) as the provider of long-distance communications service for the DOD. The DSN is designated as a primary system of communication during peacetime, periods of crisis, preattack, non-nuclear, and post-attack phases of war.
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
For example, the Fort Knox Army base in Kentucky is served by area code 502, but its local calling area includes cities that are served by the 270/364 overlay complex. As a result, Fort Knox imposed ten-digit dialing for all off-base numbers when the 270/364 overlay was established in 2014. [5] Area codes (in blue) affected in the lower 48 states.
The history of Autovon and DSN (1992) Aerial view of a repeater hut with buried cable route visible from SW to NW, Google Maps. AUTOVON switch locations in CONUS, mid-1970s; Use of pre-emption - VOICE PRECEDENCE SYSTEM CHART - Global Autovon Telephone Directory 1971; AUTOVON; AUTOmatic VOice Network (AUTOVON) instructions
Map of all Tennessee area codes. 423 - Chattanooga, Johnson City, Kingsport, Bristol: Initially split from 615 in 1995. 615 and 629 (overlay) - Greater Nashville, including Murfreesboro, Mount Juliet: 615 initially split from 901 in a 1954 flash-cut. The 629 overlay for the entire area code was made effective in 2015
Area codes 214, 469, 972, and 945 are telephone area codes in the North American Numbering Plan (NANP) for Dallas, Texas and most of the eastern portion of the Dallas–Fort Worth metroplex The area codes are assigned in an overlay complex to a single numbering plan area that was the core of one of the original area codes of 1947, area code 214.
Fort Leonard Wood: Missouri: KTBN Fort Harrison Army Airfield: Fort Harrison: Montana: MT15 Godman Army Airfield: Fort Knox: Kentucky: KFTK Gray Army Airfield: Fort Lewis: Washington: KGRF Grayling Army Airfield: Camp Grayling: Michigan: KGOV Hagler Army Airfield: Camp Shelby: Mississippi: KSLJ Henry Post Army Airfield: Fort Sill: Oklahoma ...
Fort Knox is a United States Army installation in Kentucky, south of Louisville and north of Elizabethtown. It is adjacent to the United States Bullion Depository (also known as Fort Knox), which is used to house a large portion of the United States' official gold reserves , and with which it is often conflated.