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53-532: Shenyang Taoxian International Airport ( IATA : SHE , ICAO : ZYTX ) is an international airport serving Shenyang , the capital of Northeast China ’s Liaoning province. It is located about 20 km (12 mi) south of the city center in Hunnan District . It is a hub for China Southern Airlines and is the 23rd busiest airport in China with 19,027,398 passengers as of 2018. Lufthansa offered

106-540: A four-character identifier, such as 1CA9 for Los Angeles County Fire Department Heliport. The location identifiers are coordinated with the Transport Canada Identifiers described below. In general, the FAA has authority to assign all three-letter identifiers (except those beginning with the letters K, N, W, and Y), all three- and four-character alphanumeric identifiers, and five-letter identifiers for

159-567: A new airport is built, replacing the old one, leaving the city's new "major" airport (or the only remaining airport) code to no longer correspond with the city's name. The original airport in Nashville, Tennessee, was built in 1936 as part of the Works Progress Administration and called Berry Field with the designation, BNA. A new facility known as Nashville International Airport was built in 1987 but still uses BNA. This

212-649: A staffed air traffic control facility or navigational aid within airport boundary; to airports that receive scheduled route air carrier or military airlift service, and to airports designated by the United States Customs Service as airports of entry . Some of these identifiers are assigned to certain aviation weather reporting stations. Most one-digit, two-letter identifiers have been assigned to aviation weather reporting and observation stations and special-use locations. Some of these identifiers may be assigned to public-use landing facilities within

265-509: Is GSN and its IATA code is SPN, and some coincide with IATA codes of non-U.S. airports. Canada's unusual codes—which bear little to no similarity with any conventional abbreviation to the city's name—such as YUL in Montréal , and YYZ in Toronto , originated from the two-letter codes used to identify weather reporting stations in the 1930s. The letters preceding the two-letter code follow

318-652: Is a symbolic representation for the name and the location of an airport , navigation aid , or weather station , and is used for staffed air traffic control facilities in air traffic control , telecommunications, computer programming, weather reports, and related services. The International Civil Aviation Organization establishes sets of four-letter location indicators which are published in ICAO Publication 7910 . These are used by air traffic control agencies to identify airports and by weather agencies to produce METAR weather reports. The first letter indicates

371-579: Is a three- to five-character alphanumeric code identifying aviation-related facilities inside the United States, though some codes are reserved for, and are managed by other entities. For nearly all major airports, the assigned identifiers are alphabetic three-letter codes, such as ORD for Chicago O’Hare International Airport. Minor airfields are typically assigned a mix of alphanumeric characters, such as 8N2 for Skydive Chicago Airport and 0B5 for Turners Falls Airport . Private airfields are assigned

424-554: Is available. However, many railway administrations have their own list of codes for their stations, such as the list of Amtrak station codes . Airport codes arose out of the convenience that the practice brought pilots for location identification in the 1930s. Initially, pilots in the United States used the two-letter code from the National Weather Service (NWS) for identifying cities. This system became unmanageable for cities and towns without an NWS identifier, and

477-523: Is different from the name in English, yet the airport code represents only the English name. Examples include: Due to scarcity of codes, some airports are given codes with letters not found in their names: The use of 'X' as a filler letter is a practice to create three-letter identifiers when more straightforward options were unavailable: Some airports in the United States retained their NWS ( National Weather Service ) codes and simply appended an X at

530-671: Is governed by IATA Resolution 763, and it is administered by the IATA's headquarters in Montreal , Canada. The codes are published semi-annually in the IATA Airline Coding Directory. IATA provides codes for airport handling entities, and for certain railway stations. Alphabetical lists of airports sorted by IATA code are available. A list of railway station codes , shared in agreements between airlines and rail lines such as Amtrak , SNCF , and Deutsche Bahn ,

583-513: Is in conjunction to rules aimed to avoid confusion that seem to apply in the United States, which state that "the first and second letters or second and third letters of an identifier may not be duplicated with less than 200 nautical miles separation." Thus, Washington, D.C. area's three airports all have radically different codes: IAD for Washington–Dulles , DCA for Washington–Reagan (District of Columbia Airport), and BWI for Baltimore (Baltimore–Washington International, formerly BAL). Since HOU

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636-547: Is listed with the national civilian code УХММ, the national military code ЬХММ, and the "international" UHMM. The World Meteorological Organization used a system of five-digit numeric station codes to represent synoptic weather stations. An example is 72295 for Los Angeles International Airport (LAX). A modernization of WMO station identifiers was performed as part of the WMO Integrated Global Observing System (WIGOS). A presentation at

689-545: Is no specific organization scheme to IATA identifiers; typically they take on the abbreviation of the airport or city such as MNL for Manila Ninoy Aquino Airport. In the United States, the IATA identifier usually equals the FAA identifier, but this is not always the case. A prominent example is Sawyer International Airport in Marquette, Michigan , which uses the FAA identifier SAW and the IATA identifier MQT. The Federal Aviation Administration location identifier (FAA LID)

742-543: Is not followed outside the United States: In addition, since three letter codes starting with Q are widely used in radio communication, cities whose name begins with "Q" also had to find alternate codes, as in the case of: IATA codes should not be confused with the FAA identifiers of U.S. airports. Most FAA identifiers agree with the corresponding IATA codes, but some do not, such as Saipan , whose FAA identifier

795-573: Is the Master Station Catalog or MASLIB code. This is a 6-digit numeric code that is essentially the same scheme as the WMO station identifier but adds an extra digit, allowing many more stations to be indexed. This extra digit is always "0" when referencing an actual WMO station using the five-digit identifier, but may be 1..9 to reference other stations that exist in the vicinity. The MASLIB identifiers are not generally recognized outside

848-416: Is used for William P. Hobby Airport , the new Houston–Intercontinental became IAH. The code BKK was originally assigned to Bangkok–Don Mueang and was later transferred to Suvarnabhumi Airport , while the former adopted DMK. The code ISK was originally assigned to Gandhinagar Airport (Nashik's old airport) and later on transferred to Ozar Airport (Nashik's current airport). Shanghai–Hongqiao retained

901-571: The Canadian transcontinental railroads were built, each station was assigned its own two-letter Morse code : When the Canadian government established airports, it used the existing railway codes for them as well. If the airport had a weather station, authorities added a "Y" to the front of the code, meaning "Yes" to indicate it had a weather station or some other letter to indicate it did not. When international codes were created in cooperation with

954-527: The USFS RAWS system, and by the stream gauges operated by the USGS , both of which report through GOES weather satellites operated by NOAA . These use three letters which are a mnemonic for the location, followed by the first letter of the U.S. state , followed by a numeral indicating the alphabetical order within that letter (for example, North Carolina stations end with N7). The mnemonic may be

1007-695: The United States and its jurisdictions. The Department of the Navy assigns three-letter identifiers beginning with the letter N for the exclusive use of that department. Transport Canada assigns three-character identifiers beginning with Y. The block beginning with letter Q is under international telecommunications jurisdiction, but is used internally by FAA Technical Operations to identify National Airspace equipment not covered by any other identifying code system. The block beginning with Z identifies United States Air Route Traffic Control Centers . In practice,

1060-530: The American military services, assigns special use ICAO identifiers beginning with "KQ", for use by deployed units supporting real-world contingencies; deployed/in- garrison units providing support during exercises; classified operating locations; and units that have requested, but not yet received a permanent location identifier. One system still used by both the Air Force and National Climatic Data Center

1113-696: The FAA Identifier system described above, though a few conflicts exist. The Federal Civil Aviation Agency of Mexico ( Agencia Federal de Aviación Civil , AFAC) is a designator of airfield codes, each consisting of three letters, used to identify each civil airfield in Mexico. (These characters are chosen with the same methodology as for IATA codes, i.e. taking three letters of the airfield name, for example ZPU for Zacapu Airstrip.) These airfields can be airports, private airstrips, land heliports, boat heliports, and platform helipads. For more substantial airports

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1166-584: The IATA codes, they changed when renaming some cities of the former USSR in the 1990s, e.g. Saint Petersburg (formerly Leningrad), which was ЛЕД and became СПТ . As of 2009, about 3,000 code combinations of internal code are in use. Many smaller aerodromes in Russia do not have an ICAO code. Instead, they are assigned an entry in the State and Experimental Aviation Point Location Index , or perhaps two: one civilian, normally beginning with Cyrillic "У" (=Latin "U"),

1219-548: The IATA designators are used, for example TLC for Toluca International Airport, although there are some exceptions, such IATA XAL and AFAC ALA for Alamos National Airport, Sonora. Within Russia (and before 1991 within the Soviet Union), there are airport identifiers (внутренний код - internal code) having three Cyrillic letters. They are used for e.g. ticket sales. Some small airports with scheduled flights have no IATA code, only this code and perhaps an ICAO code. Unlike

1272-470: The U.S. For example, several airports in Alaska have scheduled commercial service, such as Stebbins and Nanwalek , which use FAA codes instead of ICAO codes. Thus, neither system completely includes all airports with scheduled service. Some airports are identified in colloquial speech by their IATA code. Examples include LAX and JFK . Location identifier#FAA identifier A location identifier

1325-413: The United States and its jurisdictions, which do not meet the requirements for identifiers in the three-letter series. In this identifier series, the digit is always in the first position of the three-character combination. Most one-letter, two-digit identifiers are assigned to public-use landing facilities within the United States and its jurisdictions, which do not meet the requirements for identifiers in

1378-481: The United States, because "Y" was seldom used in the United States, Canada simply used the weather station codes for its airports, changing the "Y" to a "Z" if it conflicted with an airport code already in use. The result is that most major Canadian airport codes start with "Y" followed by two letters in the city's name (for example, YOW for O tta w a , YWG for W innipe g , YYC for C algar y , or YVR for V ancouve r ), whereas other Canadian airports append

1431-531: The United States. There have been rare instances where identifiers have been transplanted to new locations, mainly due to the closure of the original airport. Prominent examples are DEN/KDEN, which migrated from Stapleton International Airport to Denver International Airport in 1996, and AUS/KAUS, which migrated from Austin Mueller Municipal Airport to Austin–Bergstrom International Airport in 1999. Both of these cases occurred because

1484-510: The WMO site explains: The National Weather Service uses several schemes for identifying stations. It typically relies on the ICAO and WMO identifiers, although several weather forecast offices (WFOs) and weather radar sites that have moved away from airports have been given their own codes which do not conflict with existing codes. These typically end in X, such as where Birmingham, Alabama ( BHM ) had its radar site replaced by one south of

1537-462: The airport existed, Shenyang Dongta Airport  [ zh ] , was the main airport of Shenyang, built in 1921, which served destinations to the USSR , Mongolia , Japan, South Korea, North Korea, and hence, domestically. However, although it was expanded several times and had a long enough runway to support narrow-body airliners, it was no longer able to accommodate more tourists and passengers. This

1590-440: The airport itself instead of the city it serves, while another code is reserved which refers to the city itself which can be used to search for flights to any of its airports. For instance: Or using a code for the city in one of the major airports and then assigning another code to another airport: When different cities with the same name each have an airport, they need to be assigned different codes. Examples include: Sometimes,

1643-418: The airport's former name, such as Orlando International Airport 's MCO (for Mc C o y Air Force Base), or Chicago's O'Hare International Airport , which is coded ORD for its original name: Or char d Field. In rare cases, the code comes from the airport's unofficial name, such as Kahului Airport 's OGG (for local aviation pioneer Jimmy H ogg ). In large metropolitan areas, airport codes are often named after

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1696-587: The assigned identifiers are not always consistent with the current "encoding" rules adopted by the FAA, nor are all the assigned identifiers distinct between the United States and Canada. The coding system has evolved over time, and to ensure safety and reduce ambiguity, many "legacy" codes have remained intact, even though they violate the currently ordered rules. For this reason, the FAA regularly publishes detailed listings of all codes it administers In general, three-letter identifiers are assigned as radio call signs to aeronautical navigation aids; to airports with

1749-675: The city (BMX), or where the Knoxville ( TYS ) office was moved to nearby Morristown, Tennessee (MRX). Others have changed such that Miami, Florida is now MFL instead of MIA , and Dallas/Fort Worth (formerly DFW ) is now FWD. Climatological applications use the WBAN (Weather Bureau Army Navy) system, which is a five-digit numeric code for identifying weather stations under its jurisdiction. Recently it began using four-letter-plus-one-digit identifiers for specialized weather requirements such as hydrometeorological stations. These are used by

1802-502: The code SHA, while the newer Shanghai–Pudong adopted PVG. The opposite was true for Berlin : the airport Berlin–Tegel used the code TXL, while its smaller counterpart Berlin–Schönefeld used SXF; the Berlin Brandenburg Airport has the airport code BER, which is also part of its branding. The airports of Hamburg (HAM) and Hannover (HAJ) are less than 100 nautical miles (190 km) apart and therefore share

1855-934: The end. Examples include: A lot of minor airfields without scheduled passenger traffic have ICAO codes but not IATA codes, since the four letter codes allow more number of codes, and IATA codes are mainly used for passenger services such as tickets, and ICAO codes by pilots. In the US, such airfields use FAA codes instead of ICAO. There are airports with scheduled service for which there are ICAO codes but not IATA codes, such as Nkhotakota Airport/Tangole Airport in Malawi or Chōfu Airport in Tokyo, Japan. There are also several minor airports in Russia (e.g., Omsukchan Airport ) which lack IATA codes and instead use internal Russian codes for booking. Flights to these airports cannot be booked through

1908-467: The first intercontinental service out of Shenyang, to Frankfurt , Germany, in April 2012 but discontinued it on 28 October 2016, before relaunching it on 27 March 2018. Later in 2012, Sichuan Airlines launched a service to Vancouver . Construction started on 1 July 1985, and the airport opened on 16 April 1989, and was the main hub of China Northern Airlines , which started operating a year later. Before

1961-557: The first three letters of the city in which it is located, for instance: The code may also be a combination of the letters in its name, such as: Sometimes the airport code reflects pronunciation, rather than spelling, namely: For many reasons, some airport codes do not fit the normal scheme described above. Some airports, for example, cross several municipalities or regions, and therefore, use codes derived from some of their letters, resulting in: Other airports—particularly those serving cities with multiple airports—have codes derived from

2014-600: The first two, middle, or last two positions of the four-character code. The use of the FAA identifier system in meteorology ended in 1996 when airways reporting code was replaced by METAR code . The METAR code is dependent wholly on the ICAO identifier system. Since January 2019, the National Civil Aviation Agency of Brazil (ANAC) issues a six-digit designator called Aerodrome Identification Code ( Portuguese : Código de Identificação de Aeródromo , CIAD) for each aerodrome. The first two digits are

2067-478: The following format: Most large airports in Canada have codes that begin with the letter "Y", although not all "Y" codes are Canadian (for example, YUM for Yuma, Arizona , and YNT for Yantai , China), and not all Canadian airports start with the letter "Y" (for example, ZBF for Bathurst, New Brunswick ). Many Canadian airports have a code that starts with W, X or Z, but none of these are major airports. When

2120-597: The form of " YYZ ", a song by the rock band Rush , which utilizes the Morse code signal as a musical motif. Some airports have started using their IATA codes as brand names , such as Calgary International Airport (YYC) and Vancouver International Airport (YVR). Numerous New Zealand airports use codes that contain the letter Z, to distinguish them from similar airport names in other countries. Examples include HLZ for Hamilton , ZQN for Queenstown , and WSZ for Westport . Predominantly, airport codes are named after

2173-487: The international air booking systems or have international luggage transferred there, and thus, they are booked instead through the airline or a domestic booking system. Several heliports in Greenland have 3-letter codes used internally which might be IATA codes for airports in faraway countries. There are several airports with scheduled service that have not been assigned ICAO codes that do have IATA codes, especially in

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2226-527: The letters related to the State of the Federation where the aerodrome is located and the next four digits are numbers assigned by ANAC. In the case of military aerodromes, the first number is 9. Transport Canada assigns two-, three-, and four-character identifiers, including three-letter identifiers beginning with letters Y and Z, for its areas of jurisdiction. These identifiers are designed to mesh with

2279-612: The name of the airport itself, for instance: This is also true with some cities with a single airport (even if there is more than one airport in the metropolitan area of said city), such as BDL for Hartford, Connecticut 's B ra dl ey International Airport or Baltimore's BWI, for B altimore/ W ashington I nternational Airport ; however, the latter also serves Washington, D.C. , alongside Dulles International Airport (IAD, for I nternational A irport D ulles) and Ronald Reagan Washington National Airport (DCA, for D istrict of C olumbia A irport). The code also sometimes comes from

2332-722: The nearest town, or the name of the stream, or a combination of the two; and the same names may be rearranged into different mnemonics for different nearby locations. For example, VING1 is the gauge at Vinings, Georgia , and is differentiated from other stations along the Chattahoochee River (such as CHAG1 in nearby Oakdale) which are also at the Atlanta city limit like Vinings is, and from other streams in Atlanta such as Peachtree Creek (AANG1). The United States Air Force Weather Agency (AFWA), acting on behalf of all

2385-416: The one they are located in: Other airport codes are of obscure origin, and each has its own peculiarities: In Asia, codes that do not correspond with their city's names include Niigata 's KIJ , Nanchang 's KHN and Pyongyang 's FNJ . EuroAirport Basel Mulhouse Freiburg , which serves three countries, has three airport codes: BSL, MLH, EAP. Some cities have a name in their respective language which

2438-402: The other for "state" or military operations, almost always the same except that the first character is now a Cyrillic "Ь" (=Latin "X"). These codes are given in the official document which has separate columns for national codes (civilian), national codes (military & state), and some also have "international" codes; only the latter correspond to ICAO codes. For example, Magadan Sokol Airport

2491-508: The region; for example, K for the contiguous United States, C for Canada, E for northern Europe, R for the Asian Far East, and Y for Australia. Examples of ICAO location indicators are RPLL for Manila Ninoy Aquino Airport and KCEF for Westover Joint Air Reserve Base . The International Air Transport Association uses sets of three-letter IATA identifiers which are used for airline operations, baggage routing, and ticketing. There

2544-506: The same first and middle letters, indicating that this rule might be followed only in Germany. Many cities retain historical names in their airport codes, even after having undergone an official name/spelling/transliteration change: Some airport codes are based on previous names associated with a present airport, often with a military heritage. These include: Some airports are named for an administrative division or nearby city, rather than

2597-500: The station code of Malton, Mississauga , where it is located). YUL is used for Montréal–Trudeau (UL was the ID code for the beacon in the city of Kirkland , now the location of Montréal–Trudeau). While these codes make it difficult for the public to associate them with a particular Canadian city, some codes have become popular in usage despite their cryptic nature, particularly at the largest airports. Toronto's code has entered pop culture in

2650-454: The three-letter series. Some of these identifiers are also assigned to aviation weather reporting stations. Two-letter, two-digit identifiers are assigned to private-use landing facilities in the United States and its jurisdictions which do not meet the requirements for three-character assignments. They are keyed by the two-letter Post Office or supplemental abbreviation of the state with which they are associated. The two-letter code appears in

2703-515: The two-letter code of the radio beacons that were the closest to the actual airport, such as YQX in Gander or YXS in Prince George . Four of the ten provincial capital airports in Canada have ended up with codes beginning with YY, including: Canada's largest airport is YYZ for Toronto Pearson (as YTZ was already allocated to Billy Bishop Toronto City Airport , the airport was given

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2756-529: The use of two letters allowed only a few hundred combinations; a three-letter system of airport codes was implemented. This system allowed for 17,576 permutations, assuming all letters can be used in conjunction with each other. Since the U.S. Navy reserved "N" codes, and to prevent confusion with Federal Communications Commission broadcast call signs , which begin with "W" or "K", the airports of certain U.S. cities whose name begins with one of these letters had to adopt "irregular" airport codes: This practice

2809-594: Was due to the reform and opening up , resulting in the steeply rising number of passenger tourists, whether local or foreign. As a result, Taoxian airport was built and opened on 1989 and Dongta Airport ceased civil operations, and reverted to military use (by the Imperial Japanese from 1936 to 1945 and PLAAF after 1950) until 2013. The airport is served by the Shenyang Tram line 2 and line 6. IATA airport code The assignment of these codes

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