| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0BQB | 563 | 33.04 % | | 654 | 33.35 % | | 2 | C D C C | K0AV | 406 | 23.83 % | | 510 | 26.01 % | | 3 | C C D C C C | AC1RFR | 283 | 16.61 % | | 298 | 15.20 % | | 4 | C C D C C | AA0AJ | 218 | 12.79 % | | 240 | 12.24 % | | 5 | C C D C | AA7A | 177 | 10.39 % | | 192 | 9.79 % | | 6 | C D C | K0M | 47 | 2.76 % | | 57 | 2.91 % | | 7 | C D C D C | W3F3A | 2 | 0.12 % | | 2 | 0.10 % | | 8 | C D C C / D | W2QJ/4 | 2 | 0.12 % | | 2 | 0.10 % | | 9 | C D C C / C C D | K2NV/VE3 | 1 | 0.06 % | | 1 | 0.05 % | | 10 | C C D C / D | NR3B/3 | 1 | 0.06 % | | 1 | 0.05 % | | 11 | C D C C C / D | W1HSB/1 | 1 | 0.06 % | | 1 | 0.05 % | | 12 | C C D C C / C | KG9NF/M | 1 | 0.06 % | | 1 | 0.05 % | | 13 | D C D C | 4M1W | 1 | 0.06 % | | 1 | 0.05 % | | 14 | C D C C / C | W6QX/M | 1 | 0.06 % | | 1 | 0.05 % | |
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