| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4NP | 405 | 28.11 % | | 650 | 29.87 % | | 2 | C C D C C C | CM2RSV | 319 | 22.14 % | | 420 | 19.30 % | | 3 | C C D C | AA0O | 276 | 19.15 % | | 426 | 19.58 % | | 4 | C D C C | B4HQ | 240 | 16.66 % | | 385 | 17.69 % | | 5 | C D C C C | F4CVQ | 129 | 8.95 % | | 171 | 7.86 % | | 6 | D C D C C | 3D2AG | 17 | 1.18 % | | 28 | 1.29 % | | 7 | C D D C C | A60HQ | 16 | 1.11 % | | 30 | 1.38 % | | 8 | C D D C | E77F | 8 | 0.56 % | | 12 | 0.55 % | | 9 | C D C | D4Z | 7 | 0.49 % | | 11 | 0.51 % | | 10 | D C D C C C | 2E0INN | 4 | 0.28 % | | 5 | 0.23 % | | 11 | C C D C C / D | NU1AW/5 | 2 | 0.14 % | | 6 | 0.28 % | | 12 | C C D D C C C C | DL25GDXF | 2 | 0.14 % | | 3 | 0.14 % | | 13 | C D D D D C C | S5230BO | 2 | 0.14 % | | 2 | 0.09 % | | 14 | D C / C D D C C | 9A/S57KM | 1 | 0.07 % | | 1 | 0.05 % | | 15 | D C / C D C C | 9A/K7GM | 1 | 0.07 % | | 1 | 0.05 % | | 16 | C D C C / D | K2NV/2 | 1 | 0.07 % | | 3 | 0.14 % | | 17 | C D D C C C | L21RCA | 1 | 0.07 % | | 5 | 0.23 % | | 18 | D C D C | 9A7T | 1 | 0.07 % | | 2 | 0.09 % | | 19 | C C D D C C C | PH75MAA | 1 | 0.07 % | | 1 | 0.05 % | | 20 | C C D C C D | EM5HQ1 | 1 | 0.07 % | | 1 | 0.05 % | | 21 | C D D D D C | S5630A | 1 | 0.07 % | | 2 | 0.09 % | | 22 | C C D D D C C C | SX200JFL | 1 | 0.07 % | | 1 | 0.05 % | | 23 | C C D C C C / D | US7IGN/2 | 1 | 0.07 % | | 1 | 0.05 % | | 24 | C C D C C C / C | US7IGN/P | 1 | 0.07 % | | 1 | 0.05 % | | 25 | C D C C / C C D | W1AW/KL7 | 1 | 0.07 % | | 5 | 0.23 % | | 26 | C C D / C D C C C | WP4/K0BBC | 1 | 0.07 % | | 1 | 0.05 % | | 27 | C C D D C C | ZL25NZ | 1 | 0.07 % | | 2 | 0.09 % | |
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