QRZ.com is an amateur radio website listing almost every callsign in the world.

In 1992, QRZ founder Fred L. Lloyd accessed data from the FCC database to create a CD-ROM with all call signs issued in the United States.

[2] Registered users can edit their data for accuracy and currency[3] and many list additional information about their station, antennas and other life interests.

and corresponds to the site's purpose of assisting amateur radio operators with the lookup of ham radio call signs from every country in the world.

[2] The website features a personal web page where registered amateur radio operators can post pictures of their ham radio shack, tell facts about themselves, and post their email and postal addresses for other radio amateurs to send their QSL cards and list any equipment they would like to sell.