|  Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % | 
|---|
 | 1 | C C D C C C  | BD4TUC | 291 | 32.81 % |  | 362 | 35.11 % |  |  | 2 | C C D C  | AA3B | 237 | 26.72 % |  | 279 | 27.06 % |  |  | 3 | C C D C C  | AA0AW | 196 | 22.10 % |  | 218 | 21.14 % |  |  | 4 | C D C C  | K0FX | 57 | 6.43 % |  | 59 | 5.72 % |  |  | 5 | C D C C C  | F5NKX | 37 | 4.17 % |  | 38 | 3.69 % |  |  | 6 | D C D C C C  | 4E1AGW | 17 | 1.92 % |  | 20 | 1.94 % |  |  | 7 | C D D C  | E73M | 11 | 1.24 % |  | 11 | 1.07 % |  |  | 8 | C D D C C  | A71BX | 9 | 1.01 % |  | 10 | 0.97 % |  |  | 9 | D C D C  | 3Z0X | 7 | 0.79 % |  | 8 | 0.78 % |  |  | 10 | D C D C C  | 3V8SS | 6 | 0.68 % |  | 6 | 0.58 % |  |  | 11 | C D C  | B1Z | 5 | 0.56 % |  | 5 | 0.48 % |  |  | 12 | C C D D C C  | EM30UU | 5 | 0.56 % |  | 6 | 0.58 % |  |  | 13 | C C D D C C C  | OG60BBM | 2 | 0.23 % |  | 2 | 0.19 % |  |  | 14 | D C / C D C C C  | 9A/K6BFL | 1 | 0.11 % |  | 1 | 0.10 % |  |  | 15 | D C D C C C / D  | 8J1ITU/1 | 1 | 0.11 % |  | 1 | 0.10 % |  |  | 16 | C C D C C C / D  | JA4XHF/3 | 1 | 0.11 % |  | 1 | 0.10 % |  |  | 17 | C C D D C  | OG73X | 1 | 0.11 % |  | 1 | 0.10 % |  |  | 18 | C C D D D D C C  | SN1921PS | 1 | 0.11 % |  | 1 | 0.10 % |  |  | 19 | C C D C C / C  | UX1HW/M | 1 | 0.11 % |  | 1 | 0.10 % |  |  | 20 | C C D C C / D  | YB8UF/7 | 1 | 0.11 % |  | 1 | 0.10 % |  |  
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