As a radio amateur you’re probably aware of the RSGB’s Callbook containing a list of UK call signs, this is a printed book they sell.
The data comes direct from OFCOM and we are pleased to report that we have been successful in submitting an application for that same data. We have made this available, free of charge, to all licensed radio amateurs here:
https://callbook.uk
You will need to register for an account first, which you can do here: https://callbook.uk/register
You will be sent an email with a code you need to use to verify your email address. Once done you will be able to login and lookup call signs. Initially you will be able to view whether a call sign exists or not, what type of license it is, and when it was issued.
If you want to view the full data, such as name, address of the call sign holder you will need to verify your amateur radio status. To do this select “Tickets” from the top menu, then “Open New Ticket”, select “Request Account Upgrade” from the “Ticket Type:” dropdown. Attach a copy of your amateur radio license: If you are a UK amateur, this is the PDF from OFCOM. For US amateurs this is the “Official Copy” PDF downloaded from your login on the ULS site. For other countries just fill in the ticket fields asking for access and we can figure out how to verify you are a genuine radio amateur. Finally click the “Create Ticket” button and someone will process your request.
Once verified you will be able to view the full data held by OFCOM on UK radio amateurs. Please note that you will only be able to view data if the amateur has given consent, otherwise you will just see the call sign, license type and start date.
We are also downloading the full ULS data from the FCC’s API on a daily basis so all 1.6M US call signs are also available to lookup.