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Area Code 202
Image:Area code 202.svg, 350px, The red area is the District of Columbia, served by area code 202. poly 0 50 49 54 103 84 111 88 101 107 118 130 143 139 179 140 211 188 238 203 260 240 259 248 248 250 255 262 253 357 1 357 Area codes 571 and 703 poly 1 1 0 45 52 48 117 84 109 109 121 127 180 136 199 164 254 112 345 204 264 286 258 358 420 358 420 1 Area codes 240 and 301 desc bottom-left Area codes 202 and 771 are telephone area codes in the North American Numbering Plan (NANP) for Washington, D.C. Area code 202 was one of the original NANP area codes established in October 1947 by AT&T. After the State of New Jersey with area code 201, the District of Columbia was the second numbering plan area (NPA). An NPA that comprises an entire state received a code in which the second digit was "0". Area code 771 was added as a second area code to the numbering plan area in April 2021 to create an all-services overlay. History Since the creation of the North American Numbering Pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
District Of Columbia
) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, National Cathedral , image_flag = Flag of the District of Columbia.svg , image_seal = Seal of the District of Columbia.svg , nickname = D.C., The District , image_map = , map_caption = Interactive map of Washington, D.C. , coordinates = , subdivision_type = Country , subdivision_name = , established_title = Residence Act , established_date = 1790 , named_for = George Washington, Christopher Columbus , established_title1 = Organized , established_date1 = 1801 , established_title2 = Consolidated , established_date2 = 1871 , established_title3 = Home Rule Act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Shore Of Maryland
The Eastern Shore of Maryland is a part of the U.S. state of Maryland that lies mostly on the east side of the Chesapeake Bay. Nine counties are normally included in the region. The Eastern Shore is part of the larger Delmarva Peninsula that Maryland shares with Delaware and Virginia. As of the 2010 census, its population was 449,226, with just under 8% of Marylanders living in the region – less populous than the city of Baltimore. It is politically more conservative than the rest of the state, generally returning more votes for Republicans than Democrats in statewide and national elections. Developed in the colonial and federal period for agriculture, the Eastern Shore has remained a relatively rural region. The small city of Salisbury is the most populous community. The economy is dominated by three sectors: fishing along the coasts, especially for shellfish such as the blue crab; farming, especially large-scale chicken farms; and tourism, especially centered on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexandria, Virginia
Alexandria is an independent city in the northern region of the Commonwealth of Virginia, United States. It lies on the western bank of the Potomac River approximately south of downtown Washington, D.C. In 2020, the population was 159,467. The city's estimated population has grown by 1% annually since 2010 on average. Like the rest of Northern Virginia and Central Maryland, modern Alexandria has been influenced by its proximity to the U.S. capital. It is largely populated by professionals working in the federal civil service, in the U.S. military, or for one of the many private companies which contract to provide services to the federal government. One of Alexandria's largest employers is the U.S. Department of Defense. Another is the Institute for Defense Analyses. In 2005, the United States Patent and Trademark Office moved to Alexandria, and in 2017, so did the headquarters of the National Science Foundation. The historic center of Alexandria is known as Old Town ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WRC-TV
WRC-TV (channel 4) is a television station in Washington, D.C., airing programming from the NBC network. It is owned and operated by the network's NBC Owned Television Stations division alongside Class A Telemundo outlet WZDC-CD (channel 44). WRC-TV and WZDC-CD share studios on Nebraska Avenue in the Tenleytown neighborhood of Northwest Washington. Through a channel sharing agreement, the stations transmit using WRC-TV's spectrum from a tower adjacent to their studios. History The station traces its roots to experimental television station W3XNB, which was put on the air by the Radio Corporation of America, the then-parent company of NBC, in 1939. A construction permit with the commercial callsign WNBW (standing for "NBC Washington") was first issued on channel 3 (60–66 MHz, numbered channel 2 prior to 1946) on December 23, 1941. NBC requested this permit to be cancelled on June 29, 1942; later, the channel 3 allocation was reassigned to Harrisonburg, Virginia, on ... [...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] |
WTOP-FM
WTOP-FM (103.5 FM) – branded ''WTOP Radio'' and ''WTOP News'' – is a commercial all-news radio station licensed to serve Washington, D.C. Owned by Hubbard Broadcasting, the station serves the Washington metropolitan area, extending its reach through two repeater stations: WTLP (103.9 FM) in Braddock Heights, Maryland, and WWWT-FM (107.7) in Manassas, Virginia. The WTOP-FM studios, referred to on-air as the "WTOP Glass-Enclosed Nerve Center", are located in the Washington D.C. neighborhood of Friendship Heights, while the station transmitter is located on the American University campus. Besides a standard analog transmission, WTOP-FM broadcasts over three HD Radio channels, and is available online. Historically, the 103.5 FM facility is perhaps best known as WGMS-FM, which operated with a commercial fine arts and classical music format from 1948 until 2006. WTOP-FM is considered the successor station to WTOP (1500 AM), now WFED, a station founded in Brooklyn, New Yo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mobile Number Portability
Mobile number portability (MNP) enables mobile telephone users to retain their mobile telephone numbers when changing from one mobile network carrier to another. General overview Mobile number portability is implemented in varying ways across the globe. The International and European standard specifies that a customer wishing to port their number contact the new network (recipient), which then sends the number portability request (NPR) to the current network (donor). This is known as "recipient-led" porting. By contrast, the UK and India are the only exceptions to implement a "donor-led" system. In the case of a donor-led system, the customer wishing to port their number is required to contact the donor to obtain a Porting Authorisation Code (PAC) in the UK— or a Unique Porting Code (UPC) in India —which is then given to the recipient network. The recipient continues the porting process by contacting the donor with a porting code. This form of porting is known as "donor-le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Code 540
Image:Area code 540.png, 400px, The area colored red indicates the northern region of Virginia served by area code 540 poly 391 103 368 103 343 148 324 152 325 160 317 164 309 174 311 177 302 178 364 181 385 161 Area codes 757 and 948 poly 394 103 364 103 339 86 325 57 310 58 306 53 308 34 306 20 301 15 293 0 345 0 369 82 395 83 Area codes 410 and 443 poly 169 1 171 31 216 10 239 7 254 22 275 22 264 31 276 42 290 30 291 29 303 40 294 51 288 75 316 88 324 100 329 93 324 56 314 58 305 52 308 36 305 17 294 1 Area codes 240 and 301 poly 95 0 71 22 67 17 52 28 48 38 53 48 45 51 42 43 34 42 24 74 11 77 11 93 31 127 38 132 42 127 66 143 72 136 92 147 95 141 125 143 132 130 124 124 135 98 153 98 174 63 195 63 213 22 246 34 262 27 263 32 275 24 253 21 238 8 216 9 171 30 170 0 Area codes 304 and 681 poly 276 42 292 30 303 39 289 54 Area code 202 poly 112 180 111 171 131 166 136 169 150 165 163 169 180 139 186 138 187 135 185 127 213 88 231 89 234 92 233 129 241 127 240 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltimore
Baltimore ( , locally: or ) is the List of municipalities in Maryland, most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic (United States), Mid-Atlantic, and List of United States cities by population, the 30th most populous city in the United States with a population of 585,708 in 2020. Baltimore was designated an Independent city (United States), independent city by the Constitution of Maryland in 1851, and today is the most populous independent city in the United States. As of 2021, the population of the Baltimore metropolitan area was estimated to be 2,838,327, making it the List of metropolitan areas of the United States, 20th largest metropolitan area in the country. Baltimore is located about north northeast of Washington, D.C., making it a principal city in the Washington–Baltimore combined statistical area, Washington–Baltimore combined statistical area (CSA), the third-largest combined statistical area, CSA in the nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Code 410
__NOTOC__ Year 410 (CDX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year after the Consulship of Honorius and Theodosius (or, less frequently, year 1163 ''Ab urbe condita''). The denomination 410 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Spring – Constantine III crosses the Alps into Liguria (Northern Italy), but retreats to Gaul after Gerontius revolts in Spain against his son Constans II. * Raiders from Ireland, such as the Uí Liatháin and Laigin, harry the coasts of Wales. They plunder towns and capture slaves but later colonise large areas of what is called ''Gwynedd'', in particular Llŷn, the coasts of Arllechwedd, Arfon and the Isle of Mona (approximate date). * Flavius Constantius, Roman general and politician, is promot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potomac River
The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved August 15, 2011 with a drainage area of 14,700 square miles (38,000 km2), and is the fourth-largest river along the East Coast of the United States and the 21st-largest in the United States. Over 5 million people live within its watershed. The river forms part of the borders between Maryland and Washington, D.C. on the left descending bank and between West Virginia and Virginia on the right descending bank. Except for a small portion of its headwaters in West Virginia, the North Branch Potomac River is considered part of Maryland to the low-water mark on the opposite bank. The South Branch Potomac River lies completely within the state of West Virginia except for its headwaters, which lie in Virginia. Course The Potomac River r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interchangeable Central Office Code
In the North American Numbering Plan (NANP), interchangeable NPA and central office codes constituted a change in numbering plan design and policy, to mitigate exhaustion of the numbering resources of the ten-digit telephone numbers used in the closed numbering plan of the NANP. Interchangeable NPA and central office codes are codes that permit any of the ten numerals in the middle position of the area code and the central office code, which both are three-digit numbers.AT&T Network Planning Division, ''Notes on the Network'', Section 2 (1980) This change in numbering format was implemented first for central office codes by 1973, which eliminated the restriction in the middle digit (''2'' to ''9'') to also permit ''0'' and ''1''. The middle position of the area code could only be ''0'' and ''1''. In 1995, this restriction for area codes was lifted as well, creating interchangeable NPA codes. History and background The ten-digit telephone numbers of the NANP consist of a three-digit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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