ITU Callsign Prefixes - Resource Detail - The DXZone.com
callsign - How to programmatically distinguish European from non European call sign? - Amateur Radio Stack Exchange
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Ham Radio Call Signs – Ham Radio Prep
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Amazon.com: 24x36 Ham Radio World Map 2022 Edition, with the DXCC country list : Electronics
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Who's that on the Radio? Creating Your Ham Identity – Icom America Inc.
UK Amateur Radio Callsigns & Licences » Electronics Notes
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Radio Club Petitions FCC To Fix Call Area Confusion - The KØNR Radio Site
Mapping American Hams Here and There. 10 USA Call Districts.
