Squawk Codes

Squawk codes

These are the 4 digit numbers entered into an aircraft transponder, usually given by the ATC providing them with a radar service unless they are assigned them due to a specific function or displaying them to signify a specific function. These for digit codes contain digits 0 to 7 but will not contain the numbers 8 or 9.

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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