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- Call_signs_in_the_United_States abstract "Call signs in the United States are three to seven characters in length, including suffixes for certain types of service, but the minimum length for new stations is four characters, and seven-character call signs result only from rare combinations of suffixes. All broadcast call signs in the United States begin with either "K" or "W", with "K" usually west of the Mississippi River and "W" usually east of it (except in Louisiana and Minnesota, which do not strictly follow the dividing line between the two groups). Initial letters "AA" through "AL", as well as "N", are internationally allocated to the United States but are not used for broadcast stations.Each station with a traditional full-power license, whether AM, FM, television, or private shortwave, has a call sign of three or four letters, plus an optional suffix of either "-FM" or "-TV". A broadcast translator or other low-power station has either four letters with a mandatory two-letter suffix indicating its type, or a five- or six-character call sign consisting of "K" or "W", followed by two to three digits indicating its frequency, followed by two letters issued sequentially.The earliest identification, used in the 1910s and into the early 1920s, was arbitrary. The U.S. government began requiring stations to use three-letter call signs around 1912, but they could be chosen at random. This system was replaced by the basic form of the current system in the early 1920s. Examples of pre-1920 stations include 8XK in Pittsburgh, Pennsylvania, which became KDKA in November 1920, and Charles Herrold's series of identifiers from 1909 in San Jose, California: first "This is the Herrold Station" or "San Jose calling", then the call signs FN, SJN, 6XF, and 6XE, then, with the advent of modern call signs, KQW in December 1921, and eventually KCBS from 1949 onward.For most of the 20th century, new full-power stations were also assigned their four-letter call signs sequentially by the Federal Communications Commission (FCC) if the permit holder did not choose a call sign prior to full licensing. For four-letter call signs beginning with W, sequential call signs were incremented with the fourth letter being least significant and changing each time, the second letter being the next most significant, and the third letter being the least significant and changing only after every combination of second and fourth letter was exhausted. Thus, the first sequential four-letter call signs in the W sequence were of the "W_A_" form, such as (the now defunct) WMAF in South Dartmouth, Massachusetts followed soon after by WMAQ in Chicago (now WSCR). The "K" sequence was also sequential, but with a more complicated history concerning the second letter; the third and fourth letters, however, were incremented in the most obvious way, with the fourth letter least significant, then the third letter, then the second letter. For both K and W, any call signs which were already assigned were simply skipped over in the sequential system.The FCC has since begun requiring permit holders to choose the call sign prior to licensing; stations not yet given a call sign show up in FCC electronic records with the word "NEW" or the file number of the original station application instead. Stations may change their call signs whenever they wish to, and often they do so in connection with a change of radio format. Call signs become available again after 30 days of non-use, although stations (frequently under common ownership) can swap call signs at the same time.Records for officially deleted stations still remain in the electronic FCC database for some time, but with the last call sign prefixed with a "D", which is not allocated for valid station call signs in the United States; for example, a station whose last call sign was KXXX before deletion will appear in the database as DKXXX so as not to conflict with any station that may be assigned KXXX in the future. Call signs beginning with "D" are not in use in the United States and are unlikely to ever be assigned in the United States.".
- Call_signs_in_the_United_States wikiPageID "46498002".
- Call_signs_in_the_United_States wikiPageLength "27830".
- Call_signs_in_the_United_States wikiPageOutDegree "215".
- Call_signs_in_the_United_States wikiPageRevisionID "667259717".
- Call_signs_in_the_United_States wikiPageWikiLink ATSC_Standards.
- Call_signs_in_the_United_States wikiPageWikiLink Advanced_Television_Systems_Committee_standards.
- Call_signs_in_the_United_States wikiPageWikiLink Alaska.
- Call_signs_in_the_United_States wikiPageWikiLink Alpine,_New_Jersey.
- Call_signs_in_the_United_States wikiPageWikiLink Amateur_radio.
- Call_signs_in_the_United_States wikiPageWikiLink Amateur_radio_in_the_United_States.
- Call_signs_in_the_United_States wikiPageWikiLink Amateur_radio_licensing_in_the_United_States.
- Call_signs_in_the_United_States wikiPageWikiLink American_Broadcasting_Company.
- Call_signs_in_the_United_States wikiPageWikiLink American_Samoa.
- Call_signs_in_the_United_States wikiPageWikiLink Audience_measurement.
- Call_signs_in_the_United_States wikiPageWikiLink Baltimore.
- Call_signs_in_the_United_States wikiPageWikiLink Bandwidth_(signal_processing).
- Call_signs_in_the_United_States wikiPageWikiLink Big_Three_television_networks.
- Call_signs_in_the_United_States wikiPageWikiLink Bit_per_second.
- Call_signs_in_the_United_States wikiPageWikiLink Bit_rate.
- Call_signs_in_the_United_States wikiPageWikiLink Boston.
- Call_signs_in_the_United_States wikiPageWikiLink Boston,_Massachusetts.
- Call_signs_in_the_United_States wikiPageWikiLink Bracket.
- Call_signs_in_the_United_States wikiPageWikiLink Broadcast_relay_station.
- Call_signs_in_the_United_States wikiPageWikiLink Broadcast_translator.
- Call_signs_in_the_United_States wikiPageWikiLink Buffalo,_New_York.
- Call_signs_in_the_United_States wikiPageWikiLink CBS.
- Call_signs_in_the_United_States wikiPageWikiLink Call_sign.
- Call_signs_in_the_United_States wikiPageWikiLink Carrier_signal.
- Call_signs_in_the_United_States wikiPageWikiLink Carrier_wave.
- Call_signs_in_the_United_States wikiPageWikiLink Casper,_Wyoming.
- Call_signs_in_the_United_States wikiPageWikiLink Category:Call_signs.
- Call_signs_in_the_United_States wikiPageWikiLink Category:Communications_in_the_United_States.
- Call_signs_in_the_United_States wikiPageWikiLink Charles_Herrold.
- Call_signs_in_the_United_States wikiPageWikiLink Chicago.
- Call_signs_in_the_United_States wikiPageWikiLink Chicago_Tribune.
- Call_signs_in_the_United_States wikiPageWikiLink City_of_license.
- Call_signs_in_the_United_States wikiPageWikiLink Class_A_television_service.
- Call_signs_in_the_United_States wikiPageWikiLink Clear_Channel_Communications.
- Call_signs_in_the_United_States wikiPageWikiLink Code_of_Federal_Regulations.
- Call_signs_in_the_United_States wikiPageWikiLink Colorado.
- Call_signs_in_the_United_States wikiPageWikiLink Columbia,_South_Carolina.
- Call_signs_in_the_United_States wikiPageWikiLink Columbus,_Ohio.
- Call_signs_in_the_United_States wikiPageWikiLink Community_of_license.
- Call_signs_in_the_United_States wikiPageWikiLink Dallas.
- Call_signs_in_the_United_States wikiPageWikiLink Dallas-Fort_Worth_International_Airport.
- Call_signs_in_the_United_States wikiPageWikiLink Fort_Worth_International_Airport.
- Call_signs_in_the_United_States wikiPageWikiLink Dartmouth,_Massachusetts.
- Call_signs_in_the_United_States wikiPageWikiLink Denver.
- Call_signs_in_the_United_States wikiPageWikiLink Denver,_Colorado.
- Call_signs_in_the_United_States wikiPageWikiLink Detroit.
- Call_signs_in_the_United_States wikiPageWikiLink Digital_television.
- Call_signs_in_the_United_States wikiPageWikiLink Digital_television_transition_in_the_United_States.
- Call_signs_in_the_United_States wikiPageWikiLink Disambiguation.
- Call_signs_in_the_United_States wikiPageWikiLink Don_Lee_(broadcaster).
- Call_signs_in_the_United_States wikiPageWikiLink Edwin_Howard_Armstrong.
- Call_signs_in_the_United_States wikiPageWikiLink El_Paso,_Texas.
- Call_signs_in_the_United_States wikiPageWikiLink Electromagnetic_interference.
- Call_signs_in_the_United_States wikiPageWikiLink FM_band.
- Call_signs_in_the_United_States wikiPageWikiLink FM_broadcast_band.
- Call_signs_in_the_United_States wikiPageWikiLink Facility_ID.
- Call_signs_in_the_United_States wikiPageWikiLink Federal_Communications_Commission.
- Call_signs_in_the_United_States wikiPageWikiLink Federal_government_of_the_United_States.
- Call_signs_in_the_United_States wikiPageWikiLink Fort_Worth,_Texas.
- Call_signs_in_the_United_States wikiPageWikiLink Grandfather_clause.
- Call_signs_in_the_United_States wikiPageWikiLink Granite_City,_Illinois.
- Call_signs_in_the_United_States wikiPageWikiLink Guam.
- Call_signs_in_the_United_States wikiPageWikiLink HD_Radio.
- Call_signs_in_the_United_States wikiPageWikiLink Hawaii.
- Call_signs_in_the_United_States wikiPageWikiLink Highway_advisory_radio.
- Call_signs_in_the_United_States wikiPageWikiLink ICAO_airport_code.
- Call_signs_in_the_United_States wikiPageWikiLink IHeartMedia.
- Call_signs_in_the_United_States wikiPageWikiLink Illinois.
- Call_signs_in_the_United_States wikiPageWikiLink Inter-city_relay.
- Call_signs_in_the_United_States wikiPageWikiLink International_Civil_Aviation_Organization_airport_code.
- Call_signs_in_the_United_States wikiPageWikiLink Iowa.
- Call_signs_in_the_United_States wikiPageWikiLink Jurisdiction.
- Call_signs_in_the_United_States wikiPageWikiLink KCBS-TV.
- Call_signs_in_the_United_States wikiPageWikiLink KCBS_(AM).
- Call_signs_in_the_United_States wikiPageWikiLink KDFW.
- Call_signs_in_the_United_States wikiPageWikiLink KDKA_(AM).
- Call_signs_in_the_United_States wikiPageWikiLink KFOR-TV.
- Call_signs_in_the_United_States wikiPageWikiLink KGO-TV.
- Call_signs_in_the_United_States wikiPageWikiLink KHJ_(AM).
- Call_signs_in_the_United_States wikiPageWikiLink KKSU_(defunct).
- Call_signs_in_the_United_States wikiPageWikiLink KLAX-FM.
- Call_signs_in_the_United_States wikiPageWikiLink KOA_(AM).
- Call_signs_in_the_United_States wikiPageWikiLink KQKS.
- Call_signs_in_the_United_States wikiPageWikiLink KSFO.
- Call_signs_in_the_United_States wikiPageWikiLink KTCK_(AM).
- Call_signs_in_the_United_States wikiPageWikiLink KTWO-TV.
- Call_signs_in_the_United_States wikiPageWikiLink KXII.
- Call_signs_in_the_United_States wikiPageWikiLink KYW_(AM).
- Call_signs_in_the_United_States wikiPageWikiLink Kansas_State_University.
- Call_signs_in_the_United_States wikiPageWikiLink Lakewood,_Colorado.
- Call_signs_in_the_United_States wikiPageWikiLink Lincoln_Financial_Media.
- Call_signs_in_the_United_States wikiPageWikiLink List_of_three-letter_broadcast_callsigns_in_the_United_States.
- Call_signs_in_the_United_States wikiPageWikiLink Los_Angeles.
- Call_signs_in_the_United_States wikiPageWikiLink Los_Angeles_International_Airport.
- Call_signs_in_the_United_States wikiPageWikiLink Louisiana.