| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0AJW | 420 | 36.87 % | | 484 | 36.83 % | | 2 | C D C C | K0CY | 261 | 22.91 % | | 317 | 24.12 % | | 3 | C C D C C C | KA0AIG | 192 | 16.86 % | | 209 | 15.91 % | | 4 | C C D C C | AA0RW | 143 | 12.55 % | | 157 | 11.95 % | | 5 | C C D C | AA3B | 84 | 7.37 % | | 95 | 7.23 % | | 6 | C D C | K0J | 37 | 3.25 % | | 50 | 3.81 % | | 7 | C D D C | K09F | 1 | 0.09 % | | 1 | 0.08 % | | 8 | C C D C C C / C C C | VE3GTM/QRP | 1 | 0.09 % | | 1 | 0.08 % | |
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