| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AZ1A | 117 | 32.05 % | | 159 | 35.33 % | | 2 | C C D C C | AA4BQ | 104 | 28.49 % | | 121 | 26.89 % | | 3 | C C D C C C | CS7AMH | 54 | 14.79 % | | 62 | 13.78 % | | 4 | C D C C | E7DX | 30 | 8.22 % | | 37 | 8.22 % | | 5 | C D C C C | F5MYK | 18 | 4.93 % | | 22 | 4.89 % | | 6 | D C D C C | 3V8SS | 11 | 3.01 % | | 11 | 2.44 % | | 7 | C D D C | E77A | 9 | 2.47 % | | 9 | 2.00 % | | 8 | D C D C | 4L8A | 6 | 1.64 % | | 8 | 1.78 % | | 9 | C D C | C4W | 5 | 1.37 % | | 9 | 2.00 % | | 10 | C D D C C | S51DX | 4 | 1.10 % | | 4 | 0.89 % | | 11 | D C D C C C | 2E0CVN | 1 | 0.27 % | | 1 | 0.22 % | | 12 | C C D / C C D C C | IS0/OM3RM | 1 | 0.27 % | | 2 | 0.44 % | | 13 | C C D C / C D | KL2A/W3 | 1 | 0.27 % | | 1 | 0.22 % | | 14 | C D D C C C | L21RCA | 1 | 0.27 % | | 1 | 0.22 % | | 15 | C C D C C / D | RX9KT/6 | 1 | 0.27 % | | 1 | 0.22 % | | 16 | C D C C / D | K2ZR/4 | 1 | 0.27 % | | 1 | 0.22 % | | 17 | C C D C C C / D | WA8MDC/4 | 1 | 0.27 % | | 1 | 0.22 % | |
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