Ofcom Release Database of Issued UK Amateur Radio Callsigns

On 20th April 2021, in response to a Freedom of Information request, Ofcom released a database of 96,776 issued amateur radio callsigns for the UK and Crown Dependencies

The database can be useful for people wanting to apply for a specific call sign as it shows calls that are not available for issue.

Download the Issued Callsigns Database from - https://www.whatdotheyknow.com/request/718728/response/1773383/attach/10/List%20of%20issued%20Amateur%20callsigns.xlsx

The accompanying Ofcom FoI response letter - https://www.whatdotheyknow.com/request/718728/response/1773383/attach/9/IR%20List%20of%20available%20Amateur%20Radio%20Callsigns.pdf

To determine which callsigns might be available in addition to the database of issued callsigns you should also use the Ofcom database of Forbidden Suffixes - https://www.ofcom.org.uk/__data/assets/file/0026/165734/allocated-reserved-forbidden-call-sign.csv