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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 (as well as portions of Van Buren County, Tennessee, Van Buren and Sequatchie County, Tennessee, Sequatchie counties in Middle Tennessee) that are separated by area code 865. Principal cities in the northern part of the area code region are Morristown, Tennessee, Morristown, Greeneville, Tennessee, Greeneville, Kingsport, Tennessee, Kingsport, Johnson City, Tennessee, Johnson City, and Bristol, Tennessee, Bristol (more commonly known as the Tri-Cities (Tennessee), Tri-Cities region). The principal cities in the south are Chattanooga, Tennessee, Chattanooga and Cleveland, Tennessee, Cleveland. History When the American Telephone and Telegraph Company created the first nationwide telephone numbering plan for Operator Toll Dialing, the predessessor of the North American Numbering Plan, in 1947, Tennessee was a single numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Telephone And Telegraph Company
AT&T Corporation, an abbreviation for its former name, the American Telephone and Telegraph Company, was an American telecommunications company that provided voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies. During the Bell System's long history, AT&T was at times the world's largest telecommunications company, the world's largest cable television operator, and a regulated monopoly. At its peak in the 1950s and 1960s, it employed one million people and its revenue ranged between US$3 billion in 1950 ($ in present-day terms) and $12 billion in 1966 ($ in present-day terms). In 2005, AT&T was acquired by " Baby Bell" and former subsidiary SBC Communications for more than $16 billion ($ in present-day terms). SBC then changed its name to AT&T Inc., with AT&T Corporation continuing to exist as a long-distance calling subsidiary until its dissolution on May 1, 2024. History Origins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ten-digit Dialing
Ten-digit dialing is a telephone dialing procedure in the countries and territories of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when Dialling (telephony), 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 dial the three-digit central office code and the four-digit station number of the destination telephone if it resides in the same numbering plan area. Dialing of an area code before the telephone number, ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overlay Complex
In telecommunications, an area code overlay complex is a telephone numbering plan that assigns multiple area codes to the same geographic numbering plan area (NPA). Area code overlays are implemented in territories of the North American Numbering Plan (NANP) to mitigate exhaustion of central office codes in growth areas. The method has been in use since 1992, and has been the exclusive method of area code relief since 2007. History From the inception of the North American Numbering Plan in 1947 until 1992, the only method of introducing new area codes was the area code split. It divided an existing numbering plan area (NPA) into multiple regions, one of which retained the existing area code. The other parts were each assigned a new NPA code. The retaining area was usually the historically more established or developed place, and required no numbering changes. It gained numbering capacity by acquiring the central office codes of the other areas, because those were delegated ... [...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 municipa ... [...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] |
Grand Divisions Of Tennessee
The Grand Divisions are three geographic regions in the U.S. state of Tennessee, each constituting roughly one-third of the state's land area, that are geographically, culturally, legally, and economically distinct. The Grand Divisions are legally recognized in the state constitution and state law and are represented on the flag of Tennessee by the flag's three prominent stars. The Grand Divisions, East, Middle, and West Tennessee, are sometimes referred to as "the three states of Tennessee" or "the three Tennessees". Definitions The three Grand Divisions, East, Middle, and West Tennessee, are formally defined in state law at Tennessee Code Annotated Title 4, Chapter 1, Part 2 ("Grand Divisions and State Capital") as the "eastern, middle, and western" Grand Divisions of the state. The law lists the counties in each region. The boundary between East Tennessee and Middle Tennessee is on the Cumberland Plateau, which was a major barrier to travel and commerce during much of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central Time Zone
The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ..., Mexico, Central America, and a few Caribbean Islands, Caribbean islands. In parts of that zone (20 states in the US, three provinces or territories in Canada, and several border municipalities in Mexico), the Central Time Zone is affected by two time designations yearly: Central Standard Time (CST) is observed from the first Sunday in November to the second Sunday in March. It is UTC−06:00, six hours behind Coordinated Universal Time (UTC) and designated internationally as UTC−6. From the second Sunday in March to the first Sunday in November the same areas observe daylight saving time (DST), creating the designation of Central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Time Zone
The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 U.S. states, states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. * Eastern Standard Time (EST) is five hours behind Coordinated Universal Time (UTC−05:00). Observed during standard time (late autumn/winter in the United States and Canada). * Eastern Daylight Time (EDT) is four hours behind Coordinated Universal Time (UTC−04:00). Observed during daylight saving time (spring/summer/early autumn in the United States and Canada). On the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT, creating a 23-hour day. On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, which results in a 25-hour day. History The boundaries of the Eastern Time Zone have moved westward since the Interstate Commerce Commission (ICC) took over time-zone management from railroads in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knoxville
Knoxville is a city in Knox County, Tennessee, United States, and its county seat. It is located on the Tennessee River and had a population of 190,740 at the 2020 United States census. It is the largest city in the East Tennessee Grand Divisions of Tennessee, Grand Division and the state's List of municipalities in Tennessee, third-most populous city, after Nashville and Memphis, Tennessee, Memphis.U.S. Census Bureau2010 Census Interactive Population Search. Retrieved: December 20, 2011. It is the principal city of the Knoxville metropolitan area, which had a population of 879,773 in 2020. First settled in 1786, Knoxville was the first capital of Tennessee. The city struggled with geographic isolation throughout the early 19th century; the History of rail transportation in the United States#Early period (1826–1860), arrival of the railroad in 1855 led to an economic boom. The city was bitterly Tennessee in the American Civil War#Tennessee secedes, divided over the issue of sec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Code 615
Area codes 615 and 629 are area codes in Tennessee serving Nashville ( Davidson County) and the twelve surrounding counties. 615 is the parent area code, created in 1954, while 629 was added to the 615 numbering plan area in formation of an overlay complex in 2015. Other major cities in the service area are Murfreesboro, Franklin, Brentwood, Gallatin, Hendersonville, and Lebanon. History When the first area codes were assigned in October 1947, Tennessee's only area code was 901. During 1954, in a flash-cut, most of the state east of the Tennessee River's western bend was reassigned 615, while 901 was restricted to Memphis and the western third of the state. This configuration remained in place for over 41 years. In September 1995, most of the eastern portion of 615—including Chattanooga, Knoxville, and the Tri-Cities—was assigned area code 423. The dividing line between 615 and 423 mostly tracked along the boundary between the Eastern and Central Time Zones; gener ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Tennessee
West Tennessee is one of the three Grand Divisions of Tennessee that roughly comprises the western quarter of the state. The region includes 21 counties between the Tennessee and Mississippi rivers, delineated by state law. Its geography consists primarily of flat lands with rich soil and vast floodplain areas of the Mississippi River. Of the three regions, West Tennessee is the most sharply defined geographically, and is the lowest-lying. It is both the least populous and smallest, in land area, of the three Grand Divisions. Its largest city is Memphis, the state's second most populous city. West Tennessee was originally inhabited by the Chickasaw, and was the last of the three Grand Divisions to be settled by Europeans. The region officially became part of the United States with the Jackson Purchase in 1818, 22 years after Tennessee's statehood. As part of the Mississippi River basin, West Tennessee enjoys rich soil that led to large-scale cotton farming during the antebellum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
