I've been learning how to program with Microsoft Silverlight. I thought that a nice exercise would be to implement a callsign lookup application. Well... here it is!
If you have Silverlight installed you should see a form above. If you don't have Silverlight installed you should see a big button prompting you to install it from Microsoft. It's quick, easy and quite safe. It works with most common browsers on Windows and Mac.
Enter a callsign to lookup and then press the enter key or hit the lookup button with your mouse.
It's based on FCC data so it only finds US callsigns. The data comes from Callook.info which is a project created by Joshua Dick, W1JDD. Silverlight runs in the browser. When you hit the lookup button, your browser directly queries the data at Callook.info.
I just did this for my own learning. It doesn't provide anything more than you can get directly at Josh's site but feel free to use it if you find it useful. Let me know if you find any bugs.