Squawk codes
To:	1000	2000	3000	4000	5000	6000	7000
0000. SSR data unreliable 0001. Height Monitoring Unit 0002. Ground Transponder Testing 0003-0005 Not allocated 0006. British Transport Police ASU 0007. Off-shore Safety Area (OSA) Conspicuity 0010. Aircraft operating outside of Birmingham CAS and monitoring Birmingham Radar 0011. Solent Monitoring Code 0012. Aircraft operating outside of EGLL/EGLC/EGKK CAS and monitoring Thames/Gatwick Radar 0013. Aircraft operating outside of Luton/Stansted CAS and monitoring Luton/Essex Radar 0014. Kent Air Ambulance (HMD21) 0015. Essex Air Ambulance (HMD07) 0016. Thames Valley Air Ambulance(HMD24) 0017. Virgin HEMS (HMD27) 0020. Air Ambulance Helicopter Emergency Medivac 0021. Fixed-wing aircraft (Receiving service from a ship) 0022. Helicopter(s) (Receiving service from a ship) 0023. Aircraft engaged in actual SAR Operations 0024. Radar Flight Evaluation/Calibration 0025. Not allocated 0026. Special Tasks (Mil) - activated under Special Flight Notification (SFN) 0027. London AC (Swanwick) Ops Crossing/Joining CAS 0030. FIR Lost 0031. An aircraft receiving a radar service from Scottish D & D centre 0032. Aircraft engaged in police air support operations 0033. Aircraft Paradropping 0034. Antenna trailing/target towing 0035. Selected Flights - Helicopters 0036. Helicopter Pipeline/Powerline Inspection Flights 0037. Royal Flights - Helicopters 0040. Civil Helicopters North Sea 0041-0042 Greater Manchester Police ASU 0043-0044 Metropolitan Police ASU 0045. Sussex Police ASU 0046. Essex Police ASU 0047. Surrey Police ASU 0050. Chiltern Police ASU (Western Base) 0051. Chiltern Police ASU (Eastern Base) 0052. Norfolk Police ASU 0052. West Yorkshire Police ASU 0053. Suffolk Police ASU 0053. South Yorkshire Police ASU 0054. Cambridgeshire Police ASU 0054. Merseyside Police ASU 0054. South and East Wales Police ASU 0055. Cleveland Police ASU 0055. Cheshire Police ASU 0056. Northumbria Police ASU 0056. North Midlands Police ASU 0057. Strathclyde Police ASU 0057. Humberside Police ASU 0057. East Midlands Police ASU 0060. West Midlands Police ASU 0061. Lancashire Police ASU 0061. Western Counties Police ASU 0062-0077 No 1 Air Control Centre 0100. NATO - CAOC 9 Exercises (activated by NOTAM) 0101-0117 Transit (ORCAM) Brussels 0120-0137 Transit (ORCAM) Germany 0140-0177 Transit (ORCAM) Amsterdam 0200. NATO - CAOC 9 Exercises (activated by NOTAM) 0201-0213 TC Stansted/TC Luton 0201-0217 RAF Leuchars 0201-0257 Ireland Domestic 0201-0257 RNAS Yeovilton 0220. RAF Leuchars Conspicuity 0220-0237 RAF Shawbury 0221-0247 RAF Leuchars 0224-0243 Anglia Radar 0240. RAF Shawbury Conspicuity 0241-0246 RAF Shawbury 0244. North Denes Conspicuity 0245-0267 Anglia Radar 0247. Cranfield Airport - IFR Conspicuity Purposes 0260. Liverpool Airport Conspicuity 0260-0261 Coventry Airport Conspicuity 0260-0261 Oil Survey Helicopters - Faeroes/Iceland Gap 0260-0267 Westland Helicopters Yeovil 0260-0267 RAF Northolt 0261-0267 Liverpool Airport 0270-0277 Superdomestic - Ireland to UK, Germany and Benelux 0300. NATO - CAOC 9 Exercises (activated by NOTAM) 0301-0377 Transit (ORCAM) UK 0400. NATO - CAOC 9 Exercises (activated by NOTAM) 0401. RAF Leeming Conspicuity 0401. Shoreham Approach Procedural 0401-0420 Birmingham Approach 0401-0430 Exeter Approach 0401-0437 Ireland Domestic 0401-0467 RAF Lakenheath 0402-0416 RAF Leeming 0421-0446 Farnborough Radar/LARS 0427. RAF Leeming (Topcliffe) Conspicuity 0430-0443 Edinburgh Approach 0447. Farnborough LARS - Blackbushe Departures 0450-0456 Blackpool Approach 0450-0456 Farnborough Radar/LARS 0457. Blackpool Approach (Liverpool Bay and Morecambe Bay Helicopters) 0457. Farnborough LARS - Fairoaks Departures 0460-0466 Blackpool Approach 0460-0467 Farnborough Radar/LARS 0467. Blackpool Approach (Liverpool Bay and Morecambe Bay Helicopters) 0470-0477 UK Domestic 0500. NATO - CAOC 9 Exercises (activated by NOTAM) 0501-0577 Transit (ORCAM) UK 0600. NATO - CAOC 9 Exercises (activated by NOTAM) 0601-0637 Transit (ORCAM) Germany 0640-0677 Transit (ORCAM) Paris 0700. NATO - CAOC 9 Exercises (activated by NOTAM) 0701-0777 Transit (ORCAM) Maastricht
1000. IFR GAT flights operating in designated Mode S Airspace 1001-1077 Transit (ORCAM) Spain 1100. NATO - CAOC 9 Exercises (activated by NOTAM) 1101-1137 Transit (ORCAM) Rhein 1140-1177 Transit (ORCAM) UK 1177. London AC (Swanwick) FIS 1200. NATO - CAOC 9 Exercises (activated by NOTAM) 1201-1277 Channel Islands Domestic 1300. NATO - CAOC 9 Exercises (activated by NOTAM) 1301-1327 NATO - Air Policing 1330-1357 Transit (ORCAM) Bremen 1360-1377 Transit (ORCAM) Munich 1400. NATO - CAOC 9 Exercises (activated by NOTAM) 1401-1407 UK Domestic 1410-1437 Superdomestic - Shannon to UK 1440-1477 Superdomestic - Dublin to UK 1500-1577 NATO - CAOC 9 Exercises (activated by NOTAM) 1601-1677 NATO - CAOC 9 Exercises (activated by NOTAM) 1701-1727 NATO - CAOC 9 Exercises (activated by NOTAM) 1730-1746 Newquay Approach 1730-1756 RAF Coningsby 1730-1767 RAF Spadeadam 1747. Newquay Conspicuity 1757. RAF Coningsby Conspicuity 1760-1777 RAF Coningsby 1760-1777 RNAS Yeovilton Fighter Control
2000. Aircraft from non SSR environment or on the aerodrome surface 2001-2077 Transit (ORCAM) Shannon 2100. NATO - CAOC 9 Exercises (activated by NOTAM) 2101-2177 Transit (ORCAM) Amsterdam 2200. NATO - CAOC 9 Exercises (activated by NOTAM) 2201-2277 Superdomestic UK to LF, LE, LP, GC and FA 2300. NATO - CAOC 9 Exercises (activated by NOTAM) 2301-2337 Transit (ORCAM) Bordeaux 2340-2377 Transit (ORCAM) Brest 2400-2477 NATO - CAOC 9 Exercises (activated by NOTAM) 2500. NATO - CAOC 9 Exercises (activated by NOTAM) 2501-2577 Transit (ORCAM) Karlsruhe 2600. NATO - CAOC 9 Exercises (activated by NOTAM) 2601-2620 Aberdeen Approach 2601-2637 RAF Cranwell 2601-2645 MoD Boscombe Down 2601-2657 Irish Domestic Westbound departures and Eastbound arrivals 2621-2630 Aberdeen (Sumburgh Approach) 2631-2637 Aberdeen (Northern North Sea Off-shore) 2640-2657 Aberdeen (Northern North Sea Off-shore - Sumburgh Sector) 2641-2642 RAF Cranwell - Lincolnshire AIAA 2646-2647 MoD Boscombe Down - High Risks Trial 2650. MoD Boscombe Down Conspicuity 2650-2653 Leeds Bradford Approach 2651-2657 MoD Boscombe Down 2654. Leeds Bradford Conspicuity 2655-2677 Leeds Bradford Approach 2660-2675 Middle Wallop 2660-2677 Aberdeen (Northern North Sea Off-shore) 2676-2677 Middle Wallop Conspicuity 2700. NATO - CAOC 9 Exercises (activated by NOTAM) 2701-2737 Transit (ORCAM) Shannon 2740-2777 Transit (ORCAM) Zurich
3000. NATO - Aircraft receiving a service from AEW aircraft 3001-3077 Transit (ORCAM) Zurich 3100. NATO - Aircraft receiving a service from AEW aircraft 3101-3127 Transit (ORCAM) Germany 3130-3177 Transit (ORCAM) Amsterdam 3200. NATO - Aircraft receiving a service from AEW aircraft 3201-3202 UK Domestic (London TC (Swanwick) Special Sector Codes)  3203-3216 UK Domestic (London AC (Swanwick) Special Sector Codes)  3217-3220 UK Domestic 3221-3257 Superdomestic - UK to Oceanic via Shannon/Dublin 3260-3277 UK Domestic 3300. NATO - Aircraft receiving a service from AEW aircraft 3301-3304 Swanwick (Military) Special Tasks 3305-3307 London D&D Cell 3310-3367 Swanwick (Military) 3370-3377 UK Domestic 3400. NATO - Aircraft receiving a service from AEW aircraft 3401-3457 Superdomestic - UK to Germany, Netherlands and Benelux 3460-3477 Transit (ORCAM) Germany to UK 3500. NATO - Aircraft receiving a service from AEW aircraft 3501-3507 Transit (ORCAM) Luxembourg 3510-3537 Transit (ORCAM) Maastricht 3540-3577 Transit (ORCAM) Berlin 3600. NATO - Aircraft receiving a service from AEW aircraft 3601-3623 RAF Benson 3601-3632 Scottish ATSOCA Purposes 3601-3634 RAF Waddington 3601-3644 Cardiff Approach 3601-3647 Jersey Approach 3624. RAF Benson Conspicuity 3640-3645 RAF Odiham 3640-3665 RAF Marham 3640-3677 Aberdeen (Northern North Sea Off-shore) 3641-3677 BAe Warton 3645. Cardiff Approach - St Athan Conspicuity 3646. RAF Odiham Conspicuity 3646-3657 Cardiff Approach 3647-3653 RAF Odiham  3660-3677 Solent Approach (Southampton) 3666. Solent Radar Conspicuity 3666. RAF Marham - Visual Recovery 3667. RAF Marham - FIS Conspicuity 3667-3677 Solent Approach (Southampton) 3700. NATO - Aircraft receiving a service from AEW aircraft 3701-3710 Norwich Approach 3701-3710 BAe Woodford 3701-3717 Military aircraft under service from RN AEW aircraft in South West Approaches 3701-3736 RAF Brize Norton 3701-3747 Guernsey Approach 3701-3747 RAF Lossiemouth 3711. Woodford Entry/Exit Lane (Woodford Inbounds and Outbounds) 3712. Woodford Entry/Exit Lane (Manchester Inbounds) 3713. Manchester VFR/SVFR (Outbounds) 3720. RAF Cottesmore Conspicuity 3720-3727 RAF Valley 3720-3766 Newcastle Approach 3721-3754 RAF Cottesmore 3730-3736 RAF Valley 3737. RAF Valley - Visual Recovery  3737. RAF Brize Norton Approach Conspicuity 3740-3745 RAF Brize Norton 3740-3747 RAF Valley 3750. RAF Valley - VFR VATA East 3750-3763 Gatwick Approach (TC) 3751. RAF Valley - VFR VATA West 3752. RAF Valley - RIFA 3753. RAF Valley - Low Level Helicopters 3754. RAF Valley - Special Tasks 3755. RAF Valley 3755-3762 RAF Wittering Approach 3756-3765 RAF Valley - VATA IFR Traffic 3764-3767 Gatwick Tower 3767. Redhill Approach Conspicuity 3767. Newcastle Approach Conspicuity 3770-3777 ATSOCAS
4000. NATO - Aircraft receiving a service from AEW aircraft 4001-4077 Transit (ORCAM) Aix-en-Provence 4100. NATO - Aircraft receiving a service from AEW aircraft 4101-4127 Transit (ORCAM) Frankfurt 4130-4177 Transit (ORCAM) Dusseldorf 4200. NATO - Aircraft receiving a service from AEW aircraft 4201-4214 Heathrow Domestic 4215-4247 Superdomestic - Shannon inbound UK 4250. Manston Conspicuity 4250-4257 Belfast City Approach 4250-4267 Aberdeen Approach 4250-4277 BAe Bristol Filton 4250-4277 Humberside Approach 4251-4267 Manston Approach 4300. NATO - Aircraft receiving a service from AEW aircraft 4301-4307 UK Domestic 4310-4323 UK Domestic (Gatwick Special Sector Codes) 4324-4337 UK Domestic (Scottish Special Sector Codes) 4340-4353 UK Domestic (SCoACC Special Sector Codes) 4354-4377 UK Domestic 4400. NATO - Aircraft receiving a service from AEW aircraft 4401-4427 Superdomestic - Brussels FIR to UK FIR 4430-4477 Superdomestic - UK to Eire and Oceanic 4500. NATO - Aircraft receiving a service from AEW aircraft 4501. Wattisham Conspicuity 4501-4515 RAF Lyneham 4501-4520 Prestwick Approach 4501-4547 RAF Linton-on-Ouse 4502-4547 Wattisham Approach 4516-4517 RAF Lyneham Conspicuity 4520-4524 RAF Lyneham 4530-4542 MoD Aberporth 4530-4567 Plymouth (Military) Radar 4550-4567 Isle of Man 4550-4572 East Midlands Approach 4573. East Midlands Approach Conspicuity 4574. Not allocated 4575. RAF Leeming/RAF Linton-on-Ouse  4575. Southend Airport Conspicuity 4576-4577 RAF Colerne Conspicuity 4576-4577 Vale of York AIAA Conspicuity 4600. NATO - Aircraft receiving a service from AEW aircraft 4601. Hawarden Conspicuity 4601. RAF Wyton QGH Approach 4602-4607 Hawarden Approach 4610-4667 Scottish (Military) Radar  4670-4676 TC Stansted/TC Luton 4670-4677 RAF Coningsby RWS 4677. Carlisle Airport Conspicuity 4677. Luton Airport Tower Conspicuity 4700. NATO - Aircraft receiving a service from AEW aircraft 4701-4777 Special Events (activated by NOTAM)
5000. NATO - Aircraft receiving a service from AEW aircraft 5001-5012 TC Non-Standard Flights 5013-5017 UK Domestic 5020-5046 Farnborough LLARS 5047. Farnborough LLARS Conspicuity 5050-5067 Bristol Approach 5070. Bristol VFR Conspicuity 5071-5077 Bristol Approach 5100. NATO - Aircraft receiving a service from AEW aircraft 5101-5177 CRC Boulmer 5200. NATO - Aircraft receiving a service from AEW aircraft 5201-5260 Transit (ORCAM) UK 5261-5270 Transit (ORCAM) Dublin to Europe 5271-5277 Transit (ORCAM) Channel Islands 5300. NATO - Aircraft receiving a service from AEW aircraft 5301-5377 Transit (ORCAM) Barcelona 5400. NATO - Aircraft receiving a service from AEW aircraft 5401-5477 UK Domestic 5500. NATO - Aircraft receiving a service from AEW aircraft 5501-5577 Transit (ORCAM) Barcelona 5600. NATO - Aircraft receiving a service from AEW aircraft 5601-5647 Transit (ORCAM) Paris 5650-5657 Transit (ORCAM) Luxembourg 5660-5677 Transit (ORCAM) Reims 5700. NATO - Aircraft receiving a service from AEW aircraft 5701-5777 Transit (ORCAM) Geneva
6000. NATO - CAOC 9 Exercises  6001-6007 UK Domestic 6010-6037 UK Domestic 6040-6077 London (Military) Radar 6100. NATO - CAOC 9 Exercises 6101-6107 London (Military) Radar 6110-6137 Scottish (Military) Radar 6140-6147 London (Military) Radar 6151-6157 Scottish (Military) Radar 6160. Doncaster Sheffield Conspicuity 6160-6176 Cambridge Approach 6160-6176 Inverness Approach 6160-6177 Plymouth (Military) Radar 6161-6167 Doncaster Sheffield Approach 6170. Aircraft operating outside of Doncaster Sheffield Controlled Airspace Zone and Monitoring Doncaster Sheffield Radar frequency 6171-6177 Doncaster Sheffield Approach 6177. Cambridge Conspicuity 6177. Inverness VFR Conspicuity 6200. NATO - CAOC 9 Exercises  6201-6227 Superdomestic - Dublin inbound UK 6230-6247 Superdomestic - UK to Scandinavia and Russia 6250-6257 Superdomestic - UK to Amsterdam 6260-6277 Superdomestic - Amsterdam to UK, Eire and Iceland 6300. NATO - CAOC 9 Exercises  6301-6377 Superdomestic - UK to France 6400. NATO - CAOC 9 Exercises 6401-6457 Swanwick (Military) Radar 6460-6477 UK Domestic 6500. NATO - CAOC 9 Exercises  6501-6577 CRC Scampton 6600. NATO - CAOC 9 Exercises 6601-6677 Transit (ORCAM) Germany 6700. NATO - CAOC 9 Exercises 6701-6747 Transit (ORCAM) Reims 6750-6777 Transit (ORCAM) Aix-en-Provence
7000. General Conspicuity code 7001. Military Fixed-wing Low Level Conspicuity/Climbout 7002. Danger Areas General 7003. Red Arrows Transit/Display 7004. Conspicuity Aerobatics and Display 7005. High-Energy Manoeuvres 7006. Autonomous Operations within TRA and TRA (G) 7007. Open Skies Observation Aircraft 7010. Operating in Aerodrome Traffic Pattern 7011-7013 Not allocated 7014-7027 UK Domestic 7030-7045 RNAS Culdrose 7030-7046 TC Thames/TC Heathrow 7030-7047 Aldergrove Approach 7030-7066 Durham Tees Valley Airport 7030-7077 Aberdeen (Northern North Sea Off-shore) 7046-7047 RNAS Culdrose Conspicuity 7047. TC Thames (Biggin Hill Airport Conspicuity) 7050-7056 TC Thames/TC Heathrow 7057. TC Thames (London City Airport Conspicuity) 7050-7077 RNAS Culdrose 7067. Durham Tees Valley Airport Conspicuity 7070-7076 TC Thames/TC Heathrow 7077. TC Thames (London Heliport Conspicuity) 7100. London Control (Swanwick) Saturation Code 7101-7177 Transit (ORCAM) Brussels 7200. RN Ships 7201-7247 Transit (ORCAM) Vienna 7250-7257 UK Superdomestic for destinations in France and Barcelona FIR 7260-7267 Superdomestic - Shannon/Dublin to France and Spain 7270-7277 Plymouth Radar Superdomestic for destinations in UK and France 7300. Not allocated 7301-7307 Superdomestic - Shannon Eastbound landing UK 7310-7327 Superdomestic - UK to Netherlands 7330-7347 Superdomestic - Netherlands to UK 7350. Norwich Approach Conspicuity 7350-7361 MoD Ops in EG D701 (Hebrides) 7350-7365 Manchester Approach 7350-7367 RNAS Culdrose 7350-7376 Bournemouth Approach/LARS 7351-7377 Norwich Approach 7362. MoD Ops in EG D702 (Fort George) 7363. MoD Ops in EG D703 (Tain) 7367-7373 Manchester Approach 7374. Dundee Airport Conspicuity 7375. Manchester TMA and Woodvale Local Area (Woodvale UAS Conspicuity) 7377. Bournemouth Radar Conspicuity 7400. MPA/DEFRA/Fishery Protection Conspicuity 7401-7437 UK Domestic 7440-7477 Superdomestic Spain and France to UK, Ireland, Iceland and North America 7500. Special Purpose Code - Hi-Jacking 7501-7537 Transit (ORCAM) Geneva 7540-7547 Transit (ORCAM) Bremen 7550-7577 Transit (ORCAM) Paris 7600. Special Purpose Code - Radio Failure 7601-7607 Superdomestic - Shannon/Dublin to Nordic States 7610-7617 Superdomestic - Ireland to UK 7620-7657 Superdomestic - UK to USA, Canada and Caribbean 7660-7677 Superdomestic - UK to USA, Canada, Canaries and Caribbean 7700. Special Purpose Code - Emergency 7701-7717 Superdomestic - UK to France and Spain 7720-7727 Transit (ORCAM) Munich 7730-7757 Superdomestic - Shannon Eastbound landing UK 7760-7775 Superdomestic - UK to Channel Islands 7776-7777 SSR Monitors
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