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World’s leading amateur radio web site with news, technical articles, discussions, practice exams and more.

Callsign database, Solar Resource Page, FT2000, FT920 Resource Page, FT100 Resource Page, amateur radio links, and more.

The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.

*Please be aware that some combinations of search criteria may result in a longer wait.

This page provides services including amateur and club call sign search, available call sign search, forms for a new amateur application and club application, forms for an additional call sign or change of call sign request, a form for a certificate reprint and a form for change of address.

Vanity Call Signs FAQ : What Vanity call signs may Amateur Extra Class operators (or club trustees) choose?

Callsign database. Latest FCC and Canadian amateur radio information. Logging software.

In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitter station.

* Additional U.S. Prefixes: KL7 – Alaska (AK), KH6 – Hawaii (HI) FCC Regional Callsign Groups. A unique call sign is assigned to each amateur station during the processing of its license application.