| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0ANT | 506 | 37.04 % | | 551 | 35.37 % | | 2 | C D C C | K0DG | 315 | 23.06 % | | 374 | 24.01 % | | 3 | C C D C C C | CJ3ABN | 251 | 18.37 % | | 260 | 16.69 % | | 4 | C C D C C | AA0PK | 149 | 10.91 % | | 163 | 10.46 % | | 5 | C C D C | AA9H | 99 | 7.25 % | | 108 | 6.93 % | | 6 | C D C | K1C | 42 | 3.07 % | | 49 | 3.15 % | | 7 | C C D D C C | AC80QX | 1 | 0.07 % | | 1 | 0.06 % | | 8 | C C D C / C | NI9K/M | 1 | 0.07 % | | 1 | 0.06 % | | 9 | C C D D | NK40 | 1 | 0.07 % | | 1 | 0.06 % | | 10 | C D C C C / C | W4VZE/M | 1 | 0.07 % | | 1 | 0.06 % | |
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