应答机代码列表 以下列表展示了在各个国家或地区用于特定目的之航空器应答机代码和代码范围。传统来说，每个国家都通过自己的方案分配转发器代码，不同国家的代码几乎没有共同点。该列表由于历史兴趣而被保留。 飞行员通常需要将空中交通管制分配的代码应用于特定的航班。有时，国家可能会指定在没有分配代码的情况下使用的通用代码。此类通用代码在该国的航空情报手册或航行资料汇编中指定。对于国际民用航空组织（ICAO）定义的特定情况，有标准应答器代码。 下列列表中，以红色显示的应答器代码仅用于紧急情况，例如飞机劫持、无线电通信故障及機上發生緊急狀況等。 代码 国家/地区 用途 0000 欧洲 Non-discrete mode A code; shall not be used. 英国 Mode C or other SSR failure[1] 美国 Should never be assigned.[2] Military intercept code.[3] Internal ARTCC subsets assigned by Enroute Safety and Operations Support. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 0021 德国 (VFR squawk code for airspace 5,000英尺（1,500米） and below prior to 15 March 2007 when replaced by the international 7000 code for VFR traffic.)[4] 0022 德国 (VFR squawk code for airspace above 5,000英尺（1,500米） – prior to 15 March 2007 when replaced by the international 7000 code for VFR traffic.)[4] 0025 德国 Parachute dropping in progress.[來源請求] 0033 英国 Parachute dropping in progress.[1] 0041–0057 比利时 Assigned for VFR traffic under Flight Information Services (BXL FIC).[來源請求] 0100 澳大利亚 Flights operating at aerodromes (in lieu of codes 1200, 2000 or 3000 when assigned by ATC or noted in the Enroute Supplement). 0100–0400 美国 Allocated to Service Area Operations for assignment for use by Terminal/CERAP/industry/unique purpose/experimental activities.[2] 0100–0700 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. 美国 Also for use in oceanic airspace unless another code is assigned by ATC.[2] 0500, 0600, 0700 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 1000 加拿大 Instrument Flight Rules (IFR) flight below 18,000 ft ASL when no other code has been assigned.[5] ICAO Non-discrete mode A code reserved use in mode S radar/ADS-B environment where the aircraft identification will be used to correlate the flight plan instead of the mode A code.[6] 美国 Used exclusively by ADS-B aircraft to inhibit mode 3A transmission.[2] 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. Also for use in oceanic airspace unless another code is assigned by ATC (美国).[2] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 1100 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. Also for use in oceanic airspace unless another code is assigned by ATC.[2] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 1200 澳大利亚 Civil VFR flights in class E or G airspace.[7] 加拿大, 美国 Visual flight rules (VFR) flight standard squawk code used in North American airspace when no other has been assigned or is applicable.[5][2] 1201 美国 Assigned via FAR 93.95 for use by VFR aircraft in the immediate vicinity of LAX.[2] 美国 (Visual flight rules (VFR) glider operations for gliders not in contact with ATC, through February 2012.) 1202 美国 Visual flight rules (VFR) glider operations for gliders not in contact with ATC; effective February 2012.[2] 加拿大 Visual flight rules (VFR) glider operations for gliders not in contact with ATC; effective February 2017.[5][8] 1203–1272 美国 Discrete 1200 series codes unless otherwise allocated (for example, 1255), designated for DVFR aircraft and only assigned by a flight service station.[2] 1255 美国 Aircraft not in contact with an ATC facility while enroute to/from or within the designated fire fighting area(s).[2] 1273–1275 美国 Calibration Performance Monitoring Equipment (CPME) "Parrot" transponders.[2] 1276 美国 Air Defense Identification Zone (ADIZ) penetration when unable to establish communication with ATC or aeronautical facility.[2] 1277 美国 VFR aircraft which fly authorized SAR missions for the 美国AF or 美国CG while enroute to/from or within the designated search area.[2][9] 1300 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. Also for use in oceanic airspace, unless another code is assigned by ATC.[2] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 1400 加拿大 VFR flight above 12,500' ASL when no other code has been assigned.[5] 日本 VFR flight above 10,000' MSL when no other code has been assigned.[來源請求] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 1500 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. Also for use in oceanic airspace unless another code is assigned by ATC.[2] 美国 External ARTCC subset. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 1600, 1700 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 2000 澳大利亚 Civil IFR flights in class G airspace.[7] 加拿大 Uncontrolled IFR at or above 18,000 ft MSL.[5] ICAO countries Code squawked when entering a secondary surveillance radar (SSR) area from a non-SSR area used as uncontrolled IFR flight squawk code.[6] EASA countries Code that pilot shall set in the absence of ATS instructions related to code setting, unless when not receiving air traffic services. 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. Also for use in oceanic airspace unless another code is assigned by ATC.[2] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 2100 澳大利亚 Ground testing by aircraft maintenance staff.[7] 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. 美国 Also for use in oceanic airspace unless another code is assigned by ATC.[2] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 2200, 2300, 2400 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. 美国 Also for use in oceanic airspace unless another code is assigned by ATC.[2] 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 2500, 2600, 2700 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 3000 澳大利亚 Civil flights in classes A, C and D airspace, or IFR flights in class E airspace.[7] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 3100, 3200, 3300, 3400, 3500, 3600, 3700 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 4000 澳大利亚 Civil flights not involved in special operations or SAR, operating in class G airspace in excess of 15NM offshore.[7] 美国 Aircraft on a VFR Military Training Route or requiring frequent or rapid changes in altitude.[10] 美国 Non-discrete code assignments in accordance with FAA Order JO 7110.65, 5-2. 美国 Also for use in oceanic airspace unless another code is assigned by ATC.[2] 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 4100 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 4200, 4300 美国 Internal ARTCC subsets assigned by Enroute Safety and Operations Support. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 4400–4477 美国 Reserved for use by SR-71, YF-12, U-2, B-57, pressure suit flights, and aircraft operations above FL600.[2][10] 4401–4433 美国 Reserved in accordance with FAA Order JO 7110.67 (Federal Law Enforcement).[2] 4434–4437 美国 Weather reconnaissance, as appropriate.[2] 4440,4441 美国 Operations above FL600 for Lockheed/NASA from Moffett Field.[2] 4442–4446 美国 Operations above FL600 for Lockheed from Air Force Plant 42.[2] 4447–4452 美国 Operations above FL600 for SR-71/U-2 operations from Edwards AFB.[2] 4453 美国 High balloon operations: National Scientific Balloon Facility in Palestine, Texas; and other providers, some in international operations.[2] 4454–4465 美国 Air Force operations above FL600 as designated in FAA Order 7610.4.[2] 4466–4477 美国 Reserved in accordance with FAA Order JO 7110.67 (Federal Law Enforcement).[2] 4500, 4600, 4700 美国 Internal ARTCC subsets assigned by Enroute Safety and Operations Support. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 5000 澳大利亚 Aircraft flying on military operations.[7] 美国, 加拿大 Reserved for use by NORAD.[2] 5061–5062, 5100, 5200 美国 Reserved for special use by Potomac TRACON.[2] 5100, 5200, 5300, 5500 美国 Internal ARTCC subsets assigned by Enroute Safety and Operations Support. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 5100–5300 美国 May be used by DOD aircraft beyond radar coverage but inside 美国 controlled airspace with coordination as appropriate with applicable Area Operations Directorate.[2] 5400 美国, 加拿大 Reserved for use by NORAD.[2] 5600, 5700 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 6000 澳大利亚 Military flights in class G airspace.[7] 美国 External ARTCC subset. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 6100 美国, 加拿大 Reserved for use by NORAD.[2] 6200, 6300 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 6400 美国, 加拿大 Reserved for use by NORAD.[2] 6500, 6600, 6700 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 7000 ICAO VFR standard squawk code when no other code has been assigned.[6] EASA countries Code that pilot shall set when not receiving air traffic services, unless otherwise prescribed by the competent authority.[11] 美国 External ARTCC subset. (Block of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] 澳大利亚 Unmanned aerial vehicle in all classes of airspace and when instructed to enable transponder.[7] 7001 France Used in some countries to identify VFR traffic. 英国 Sudden military climb out from low-level operations.[1] 7004 英国 Aerobatic and display code in some countries.[1] 7100, 7200, 7300 美国 External ARTCC subsets. (Blocks of discrete codes except that xx00 is used as a non-discrete code after all discrete codes are assigned.)[2] Switzerland 7100 in Switzerland for SAR (REGA).[12] 7400 美国, 英国, 澳大利亚 Unmanned aerial vehicle lost link.[13][14][15] 7500 ICAO 飞机被劫持[2][5] 7501–7577 美国 Reserved for use by Continental NORAD Region (CONR).[2] 7600 ICAO 飞机通讯故障[2][5] 7601–7607 美国 Reserved for special use by FAA.[2] 7610–7676 美国 External ARTCC subset (block of discrete codes).[2] 7615 澳大利亚 Civil flights engaged in littoral zone surveillance.[7] 7700 ICAO 飞机遭遇紧急情况[2][5] 7701–7707 美国 Reserved for special use by FAA.[2] 7710–7776 美国 External ARTCC subset (block of discrete codes).[2] 7777 美国, 德国, 比利时, 荷兰 Non-discrete code used by fixed test transponders (RABMs) to check correctness of radar stations (BITE). 美国 DOD interceptor aircraft on active air-defense missions and operating without ATC clearance in accordance with FAA Order 7610.4.[2][16] 參考資料 ^ 1.0 1.1 1.2 1.3 UK AIP ENR 1.6.2 – SSR Operating Procedures and UK SSR Code Assignment Plan (PDF). UK Civil Aviation Authority. 2007-11-06. （原始内容 (PDF)存档于2009-01-24）.  ^ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 2.27 2.28 2.29 2.30 2.31 2.32 2.33 2.34 2.35 2.36 2.37 2.38 2.39 2.40 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.50 2.51 2.52 2.53 2.54 2.55 2.56 2.57 2.58 2.59 2.60 2.61 2.62 2.63 2.64 2.65 2.66 2.67 2.68 US Department of Transportation, Federal Aviation Administration. JO 7110.66F, National Beacon Code Allocation Plan. US Government. [2019-12-06]. （原始内容存档于2022-05-09）.  ^ Radio Communications Revision E. King Schools, Inc. 2006: 4–16.  ^ 4.0 4.1 Change of German VFR transponder codes A/C 7000 replaces A/C 0021 and A/C 0022. SkyControl Aviation & Aerospace News. 2007-11-06 [2018-07-16]. （原始内容存档于2009-07-14）.  ^ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 Transport Canada. TP 14371 – Transport Canada Aeronautical Information Manual (TC AIM) – Communications (COM) 8.0. 2020-03-26 [2022-05-09]. （原始内容存档于2022-04-12）.  ^ 6.0 6.1 6.2 引用错误：没有为名为ICAO doc 4444 & ICAO Annex 10的参考文献提供内容 ^ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 引用错误：没有为名为AUS AIP 1.6 7.1.4的参考文献提供内容 ^ Transport Canada. Aviation Safety Flyer Issue 2/2017 (PDF). [2022-05-09]. （原始内容 (PDF)存档于2022-07-09）.  ^ 引用错误：没有为名为atc0502的参考文献提供内容 ^ 10.0 10.1 FAA Order 7110.65R (Air Traffic Control procedural manual) chapter 5.2, Beacon Systems. Federal Aviation Authority. 2008-01-21 [2022-05-09]. （原始内容存档于2015-03-26）.  ^ 引用错误：没有为名为EASA_SERA.13005的参考文献提供内容 ^ DZ Transponder Codes/Separations Flashcards. quizlet.com. [2016-07-21]. （原始内容存档于2022-05-31）.  ^ FAA. Notice (PDF). faa.gov. 11 October 2016 [14 March 2022]. （原始内容 (PDF)存档于2 January 2020）.  ^ Enr 1.6 Ats Surveillance Services and Procedures. 19 December 2019.  ^ Australian AIP ENR 1.6 para 6.4.6 ^ Aeronautical Information Manual, chapter 4 – Air Traffic Control. Federal Aviation Administration. 2007-11-06 [2022-05-09]. （原始内容存档于2012-02-03）.

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Prefix: a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9

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