#Callsign Structure

Callsign structure is the way an amateur radio callsign is built from a prefix, a single digit and a suffix, with optional portable indicators. Knowing the structure helps a contester decide at a glance whether a copied call is complete or only a fragment. It also explains why a call with a missing letter can still look plausible while belonging to nobody. Articles under this tag show how the parts of a call are used in country and prefix multipliers. They also explain what happens to an incomplete call when a log is checked. The aim is to help operators log whole calls the first time.