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Area Code 423
Area code 423 is a telephone area code in the North American Numbering Plan for the U.S. state of Tennessee. It comprises two disconnected areas of East Tennessee that are separated by area code 865. Principal cities in the northern part of the area code region are Morristown, Greeneville, Kingsport, Johnson City, and Bristol (more commonly known as the Tri-Cities region). The principal cities in the south are Chattanooga and Cleveland. History When the North American Numbering Plan was created in 1947, Tennessee was a single numbering plan area (NPA) with area code 901. In 1954, 901 was reduced to West Tennessee, while the eastern part of the state received area code 615. In 1995, the eastern portion of 615, including Knoxville, Chattanooga, and the Tri-Cities, was split off as area code 423. This was the first new area code in the state in 41 years. The boundary between 423 and 615 roughly followed the line between the Eastern and Central time zones; generally, Tenness ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Codes TN
Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while ''surface area'' refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analogue of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knoxville
Knoxville is a city in and the county seat of Knox County in the U.S. state of Tennessee. As of the 2020 United States census, Knoxville's population was 190,740, making it the largest city in the East Tennessee Grand Division and the state's third largest city after Nashville and Memphis.U.S. Census Bureau2010 Census Interactive Population Search. Retrieved: December 20, 2011. Knoxville is the principal city of the Knoxville Metropolitan Statistical Area, which had an estimated population of 869,046 in 2019. First settled in 1786, Knoxville was the first capital of Tennessee. The city struggled with geographic isolation throughout the early 19th century. The arrival of the railroad in 1855 led to an economic boom. The city was bitterly divided over the secession issue during the American Civil War and was occupied alternately by Confederate and Union armies, culminating in the Battle of Fort Sanders in 1863. Following the war, Knoxville grew rapidly as a major wholesaling ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Code 276
Area code 276 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Virginia. It was established by a split of area code 540 on September 1, 2001. Prior to October 2021, area code 276 had telephone numbers assigned for the central office code 988. In 2020, ''988'' was designated nationwide as a dialing code for the National Suicide Prevention Lifeline, which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021. Service area The service area comprises the southwest corner of the Commonwealth of Virginia, including most of the New River Valley and the Virginia side of the Tri-Cities. Within the service area are the following independent cities: * Bristol * Galax * Martinsville * Norton The following counties are also located in the numbering plan area: * Bland * Buchanan * Carroll * Dickenson * Grayson * Henry * Lee * Patrick * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Code 606
Area code 606 is a telephone area code serving the eastern half of south-central and all of the eastern part of the Commonwealth of Kentucky. Cities and towns in the area code include Ashland, Morehead, Hazard, Middlesboro, Somerset, Stanford, London, Corbin, Greenup, Paintsville, Pikeville and Maysville. Most of its service area lies within the Kentucky region known as the Eastern Kentucky Coalfield. It runs along the entire length of the state's borders with Virginia and West Virginia. It was created in 1954 as a split from area code 502, and originally covered the entire eastern half of Kentucky, as far west as Lexington and Northern Kentucky (the Kentucky side of the Cincinnati area). Notably, it was one of the first three area codes with "0" as the middle digit that were not assigned to an entire state; the others were area code 507 in Minnesota and area code 607 in New York. In 1999, most of the northwestern portion of the old 606 territory, including Lexington ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Number Pooling
Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States. Instead of allocating blocks of ten thousand numbers to each carrier in each community, a block of ten thousand numbers is assigned to an individual geographic rate center. That block is then split into ten blocks of a thousand numbers each, which can be separately assigned to competitive local exchange carriers by a number pooling administrator. This reduces the quantity of wasted numbers in markets which have been fragmented between multiple carriers. History The North American Numbering Plan is based on fixed-length telephone numbers; when area codes (1947) and direct distance dialling (1951) were first introduced, North American numbers were gradually extended to a fixed length in the format 1 + three-digit area code + three-digit exchange prefix + four-digit subscriber number. Each central office (CO) code (exchange prefix) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American Numbering Plan Administration
The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the international calling code ''1''. Some North American countries, most notably Mexico, do not participate in the NANP. The NANP was originally devised in the 1940s by the American Telephone and Telegraph Company (AT&T) for the Bell System and the independent telephone operators in North America. The goal was to unify the diverse local numbering plans that had been established in the preceding decades and prepare the continent for direct-dialing of calls by customers without the involvement of telephone operators. AT&T continued to administer the numbering plan until the breakup of the Bell System, when administration was delegated to the North American Numbering Plan Administrator (NANPA), a service that has been procured from the private sector by the Federal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tennessee
The University of Tennessee (officially The University of Tennessee, Knoxville; or UT Knoxville; UTK; or UT) is a public land-grant research university in Knoxville, Tennessee. Founded in 1794, two years before Tennessee became the 16th state, it is the flagship campus of the University of Tennessee system, with ten undergraduate colleges and eleven graduate colleges. It hosts more than 30,000 students from all 50 states and more than 100 foreign countries. It is classified among "R1: Doctoral Universities – Very high research activity". UT's ties to nearby Oak Ridge National Laboratory, established under UT President Andrew Holt and continued under the UT–Battelle partnership, allow for considerable research opportunities for faculty and students. Also affiliated with the university are the Howard H. Baker Jr. Center for Public Policy, the University of Tennessee Anthropological Research Facility, and the University of Tennessee Arboretum, which occupies of nearby Oak R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ten-digit Dialing
Ten-digit dialing is a telephone dialing procedure in the countries and territories that are members of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when dialing to initiate a telephone call. When necessary, the ten-digit number may be prefixed with the trunk code ''1'', which is referred to as ''1+10-digit dialing'' or ''national format''. History The implementation and expansion of the North American Numbering Plan between 1947 and 1992 preserved a long-standing practice in the United States and Canada that callers should only need to dial the local seven-digit telephone number when placing a call within the caller's exchange area or within the home numbering plan area (NPA). In seven-digit dialing. callers dialed the three-digit central office code and the four-digit station number of the telephone subscriber to reach in the same numbering plan area. Dialing of an area code before the telephone number, referred to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overlay Plan
Overlay may refer to: Computers *Overlay network, a computer network which is built on top of another network *Hardware overlay, one type of video overlay that uses memory dedicated to the application *Another term for exec, replacing one process by another *Overlay (programming), a technique to reduce the amount of memory used by a program *Overlay keyboard, a specialized keyboard with no pre-set keys * Keyboard overlay, a sheet of printed text sitting between the keys, depicting an alternate keyboard layout *Vector overlay, an analysis procedure in a geographic information system for integrating multiple data sets Other uses *Overlay architecture, temporary elements that supplement existing buildings and infrastructure for major sporting events or festivals *Overlay control, in semiconductor manufacturing, for monitoring layer-to-layer alignment on multi-layer device structures *Overlay plan, a method of introducing new area codes in telephony *Historic overlay district, a zonin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geographic Contiguity
Geographic contiguity is the characteristic in geography of political or geographical land divisions, as a group, not being interrupted by other land or water. Such divisions are referred to as being ''contiguous.'' In the United States, for example, the "48 contiguous states" excludes Hawaii and Alaska, which do not share borders with other U.S. states. Other examples of geographical contiguity might include the "contiguous European Union" excluding member states such as Ireland, Sweden, Finland (between Åland and Turku Archipelago), Malta and Cyprus (these being non-contiguous), or the "contiguous United Kingdom" referring to all parts of the country excepting Northern Ireland (it being geographically non-contiguous). Two or more contiguous municipalities can be consolidated into one, or one municipality can consist of many noncontiguous elements. For example, the Financially Distressed Municipalities Act allows the commonwealth of Pennsylvania to merge contiguous municipaliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tennessee Regulatory Authority
The Tennessee Public Utility Commission (TPUC) is the Tennessee governmental unit charged with the responsibility of setting rates and service standards for privately owned telephone, natural gas, electric, and water utilities. History The Tennessee Regulatory Authority (TRA) was established on July 1, 1996, following the shutdown of the Tennessee Public Service Commission. When established, the TRA was headed by three directors, with the governor, lieutenant governor, and speaker of the Tennessee House of Representatives each appointing one director. The initial directors were H. Lynn Greer, Jr., Sara P. Kyle, and Melvin J. Malone. In 2002 a fourth director was added by the Tennessee General Assembly, to be appointed by joint agreement among the governor, lieutenant governor, and speaker of the House. Each director serves a six-year term. After 2008 the terms were required to be staggered. In 2012, Governor Bill Haslam proposed to eliminate the full-time TRA board, replaci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Tennessee
Middle Tennessee is one of the three Grand Divisions of the U.S. state of Tennessee that composes roughly the central portion of the state. It is delineated according to state law as 41 of the state's 95 counties. Middle Tennessee contains the state's capital and largest city, Nashville, as well as Clarksville, the state's fifth largest city, and Murfreesboro, the state's sixth largest city and largest suburb of Nashville. The Nashville metropolitan area, located entirely within the region, is the most populous metropolitan area in the state, and the Clarksville metropolitan area is the state's sixth most populous. Middle Tennessee is both the largest, in terms of land area, and the most populous of the state's three Grand Divisions. Geographically, Middle Tennessee is composed of the Highland Rim, which completely surrounds the Nashville Basin. The Cumberland Plateau is located in the eastern part of the region. Culturally, Middle Tennessee is considered part of the Upland Sout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
