Mode 3/A code allocation information
SSR codes can be requested for prolonged use by air traffic control services or for aircraft identification.
We need the following information by email or post to start assessing the request:
The application and assessment process can take up to four months.
The allocation of a code or set of codes does not imply any right over its continued use and it may be necessary to withdraw or reallocate codes to effectively manage requirements.
SSR codes can also be requested for temporary allocation, for example for military exercises or civil aviation air shows.
Temporary requests should be submitted at least one month before the proposed use of the temporary code using the SSR NOTAM Application Form which can be posted or faxed to us.
There are a finite number of codes available so we cannot guarantee allocations.
Surveillance & Spectrum Management