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AE7Q's Amateur Radio Database Query Tools
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HamCall World-Wide Callsign Database
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map of callsign prefixes for computer desktop? : r/amateurradio
RSGB World Prefix Map - Radio Amateur's Map of the World
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eHamRadio - USA Ham Radio Callsigns and General Population
Maps & Charts - Ellijay Amateur Radio Society
Tourist Ham Radio in Italy - IW5EDI Simone - Ham-Radio
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File:US Amateur callsign regions.svg - Wikipedia
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UA6YW - Callsign Lookup by QRZ Ham Radio
