Prefixes is a DXCC and callsign prefix reference built into the app. After you have opened it once while online, search and browse work without a connection. The Updated date below the mode picker shows when the reference data was last refreshed from Club Log.
A segmented control switches between Search and Browse. Search is the everyday entry point: type a callsign or prefix and tap a result for resolution to entity, zone, continent, and related notes. Browse lets you work through entities and prefix groups alphabetically or on a map. Detail screens list prefixes, zones, and callsign notes where available. From entity detail you can jump to Check for your need status on that country.
The refresh button in the toolbar downloads the latest reference data; a spinner appears while updating. On first launch the app loads any saved data, then checks for updates when you are online. If nothing has been downloaded yet, the screen asks you to connect and refresh.
Prefixes is reference only; it does not change your log. CQ Zones uses the same entity data when showing countries in a zone.
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