| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0ACP | 491 | 26.31 % | | 505 | 26.36 % | | 2 | C D C C | K0AD | 436 | 23.37 % | | 439 | 22.91 % | | 3 | C C D C C C | CF7XNL | 419 | 22.45 % | | 441 | 23.02 % | | 4 | C C D C C | AA0AO | 279 | 14.95 % | | 286 | 14.93 % | | 5 | C C D C | AA3S | 234 | 12.54 % | | 238 | 12.42 % | | 6 | D C C | 0GN | 1 | 0.05 % | | 1 | 0.05 % | | 7 | D C D C C | 4U1WB | 1 | 0.05 % | | 1 | 0.05 % | | 8 | C D C C / D | K7RB/1 | 1 | 0.05 % | | 1 | 0.05 % | | 9 | C D C C / C C D | K7SJ/VE1 | 1 | 0.05 % | | 1 | 0.05 % | | 10 | C D C C / C | W2PJ/M | 1 | 0.05 % | | 1 | 0.05 % | | 11 | C D C | W2R | 1 | 0.05 % | | 1 | 0.05 % | | 12 | C D C C C / C | W4WCH/M | 1 | 0.05 % | | 1 | 0.05 % | |
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