| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4LS | 217 | 29.60 % | | 221 | 29.27 % | | 2 | C C D C | AA3B | 211 | 28.79 % | | 220 | 29.14 % | | 3 | C C D C C C | DF1LON | 151 | 20.60 % | | 156 | 20.66 % | | 4 | C D C C | F5IN | 75 | 10.23 % | | 76 | 10.07 % | | 5 | C D C C C | F1TRE | 22 | 3.00 % | | 23 | 3.05 % | | 6 | C D D C | E70T | 16 | 2.18 % | | 17 | 2.25 % | | 7 | D C D C | 3Z0X | 9 | 1.23 % | | 10 | 1.32 % | | 8 | D C D C C | 4Z4TX | 9 | 1.23 % | | 9 | 1.19 % | | 9 | C D C | C4W | 7 | 0.95 % | | 7 | 0.93 % | | 10 | C D D C C | E73PS | 5 | 0.68 % | | 5 | 0.66 % | | 11 | C C D D D C C | HG315VA | 2 | 0.27 % | | 2 | 0.26 % | | 12 | C D D C C C | S53EOP | 2 | 0.27 % | | 2 | 0.26 % | | 13 | D C D C C C | 2E0CVN | 1 | 0.14 % | | 1 | 0.13 % | | 14 | C C D / C C D C C C | EA5/PA3FOC | 1 | 0.14 % | | 1 | 0.13 % | | 15 | C C / C D C C C | OH/M0CFW | 1 | 0.14 % | | 1 | 0.13 % | | 16 | C C D D D C C C | OL725PLZ | 1 | 0.14 % | | 1 | 0.13 % | | 17 | C D C C / D | R3LA/4 | 1 | 0.14 % | | 1 | 0.13 % | | 18 | C C D D C | OG66X | 1 | 0.14 % | | 1 | 0.13 % | | 19 | C C D C / D | ZR2A/4 | 1 | 0.14 % | | 1 | 0.13 % | |
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