- A Vanity callsign is a special Amateur Radio callsign specifically chosen by a person who is currently an Amateur Radio licensee (similar in purpose to Vanity license plates on cars).www.arrl.org/arrlvec/vanity.html
- QRZ.com provides the latest FCC updates, newest DX callsigns, latest biography updates, newest picture/ QSL card images, a biography keyword search, name search and DX QSL managers list.www.qrz.com/callbook.html
- The Ultimate DX web site and DX Bulletin board ...www.qsl.net/n9szv
- Callsign search engine - worldwide, by country and information about callsigns.www.bobhays.com/KF9UL/index.html