| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4TI | 720 | 32.20 % | | 969 | 31.44 % | | 2 | C C D C C C | CO8NMN | 596 | 26.65 % | | 773 | 25.08 % | | 3 | C C D C | AA3K | 471 | 21.06 % | | 750 | 24.33 % | | 4 | C D C C C | C6AGU | 195 | 8.72 % | | 252 | 8.18 % | | 5 | C D C C | E7CW | 73 | 3.26 % | | 91 | 2.95 % | | 6 | C D D C | A60A | 53 | 2.37 % | | 71 | 2.30 % | | 7 | C D D C C | E73AA | 38 | 1.70 % | | 60 | 1.95 % | | 8 | C D C | C4W | 32 | 1.43 % | | 44 | 1.43 % | | 9 | D C D C C | 3V8SS | 26 | 1.16 % | | 35 | 1.14 % | | 10 | D C D C | 3Z1K | 15 | 0.67 % | | 18 | 0.58 % | | 11 | D C D C C C | 2E0LMA | 2 | 0.09 % | | 3 | 0.10 % | | 12 | C C D / C C D C | EA5/RV2A | 2 | 0.09 % | | 2 | 0.06 % | | 13 | C C D / C D C C | CT7/K9PM | 1 | 0.04 % | | 1 | 0.03 % | | 14 | C / C C D C C | F/DJ4MZ | 1 | 0.04 % | | 1 | 0.03 % | | 15 | C / C D D C | F/E72T | 1 | 0.04 % | | 1 | 0.03 % | | 16 | C D / C D D C | I0/S58Y | 1 | 0.04 % | | 1 | 0.03 % | | 17 | C C D C C C / C C | IU1DUB/MM | 1 | 0.04 % | | 1 | 0.03 % | | 18 | C C D / C C D C C C | KP4/IZ3EYZ | 1 | 0.04 % | | 1 | 0.03 % | | 19 | C C D D | LY55 | 1 | 0.04 % | | 1 | 0.03 % | | 20 | C C D D D D C | OH3077F | 1 | 0.04 % | | 1 | 0.03 % | | 21 | C C D D C C C | PA75PKZ | 1 | 0.04 % | | 2 | 0.06 % | | 22 | C D / C D C C C | S5/M0MPM | 1 | 0.04 % | | 1 | 0.03 % | | 23 | C C D C C C / C | US7IGN/P | 1 | 0.04 % | | 1 | 0.03 % | | 24 | C C D C C / C | UX1HW/M | 1 | 0.04 % | | 1 | 0.03 % | | 25 | C C D C / D | ZR2A/4 | 1 | 0.04 % | | 1 | 0.03 % | |
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