Transponder Codes
 
 

SSR Codes


 

Code

Assignment
0000-0777
0000 SSR data unreliable
0001-0017 Air Ambulance Emergency Medivac - Helicopter
0020-0027 Air Ambulance Emergency Medivac
0030-0037 Radar Flight Evaluation / Sector Calibration
0040-0057 MET research flight
0060-0077 Aircraft Paradropping
0100-0177 Royal Flights
0200-0277 Royal Flights - Helicopter
0300-0777 Not allocated yet
1000-1777
1000 NATO Fighter Ops.
1001-1077 Not allocated yet
1100 NATO Fighter Ops.
1101-1177 Not allocated yet
1200 Standard VFR in US. - In Europe Standard VFR is 7000 or 2000 - (Standard FS Squawk)
1201-1777 Not allocated yet
2000-2777
2000 Standard VFR in Europe - In US. standard VFR code is 1200
2001-2777 VFR Flights
3000-3777
3000 NATO Fighter Ops.
3001-3777 Not allocated yet
4000-4777
4000 NATO Fighter Ops.
4001-4777 Not allocated yet
5000-5777
5000 NATO Fighter Ops.
5001-5777 Not allocated yet
6000-6777
6000 NATO Fighter Ops.
6001-6777 Not allocated yet
7000-7777
7000 Standard VFR in Europe - In US. standard VFR code is 1200
7001-7017 Aerobactic flights
7020-7037 Police Flights
7040-7477 VFR flights
7500 Hi-Jacking
7501-7527 Aircraft engaged in police air support operations
7530-7557 Aircraft engaged in police air support operations - Helicopters
7600 Radio Failure
7700 Emergency
7701-7727                Aircraft engaged in actual SAR Operations
7730-7757 Aircraft engaged in actual SAR Operations - Helicopters
7760-7776 Ground Transponders Tests/Trials