| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AB0RX | 193 | 29.97 % | | 194 | 29.85 % | | 2 | C C D C C C | BH7PFH | 185 | 28.73 % | | 186 | 28.62 % | | 3 | C C D C | AA3B | 113 | 17.55 % | | 115 | 17.69 % | | 4 | C D C C | K0FX | 63 | 9.78 % | | 63 | 9.69 % | | 5 | C D C C C | C6AUM | 59 | 9.16 % | | 61 | 9.38 % | | 6 | C D D C | J35X | 5 | 0.78 % | | 5 | 0.77 % | | 7 | D C D C C | 4K6FO | 5 | 0.78 % | | 5 | 0.77 % | | 8 | D C D C | 3Z5N | 4 | 0.62 % | | 4 | 0.62 % | | 9 | C C D C C C / D | JA0LNN/1 | 3 | 0.47 % | | 3 | 0.46 % | | 10 | D C D C C C | 7L2MDI | 3 | 0.47 % | | 3 | 0.46 % | | 11 | C D D C C | S51JQ | 2 | 0.31 % | | 2 | 0.31 % | | 12 | C C D C / D | KG4V/1 | 2 | 0.31 % | | 2 | 0.31 % | | 13 | C C D / C C D C C C | KH6/KD2BGM | 1 | 0.16 % | | 1 | 0.15 % | | 14 | C D C | M7Q | 1 | 0.16 % | | 1 | 0.15 % | | 15 | C C D D C C | OG30OJ | 1 | 0.16 % | | 1 | 0.15 % | | 16 | C C D D C | OH10X | 1 | 0.16 % | | 1 | 0.15 % | | 17 | C D D C C C | E74EBL | 1 | 0.16 % | | 1 | 0.15 % | | 18 | C D C C C / D | W3DQN/5 | 1 | 0.16 % | | 1 | 0.15 % | | 19 | C C D D D C C | YL390UI | 1 | 0.16 % | | 1 | 0.15 % | |
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