| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BXT | 38 | 36.19 % | | 38 | 35.85 % | | 2 | C C D C C | CN8KD | 34 | 32.38 % | | 35 | 33.02 % | | 3 | C C D C | EA1B | 23 | 21.90 % | | 23 | 21.70 % | | 4 | C D C C C | F4CVQ | 4 | 3.81 % | | 4 | 3.77 % | | 5 | C D C C | N2WK | 3 | 2.86 % | | 3 | 2.83 % | | 6 | D C D C C C | 5B4AMM | 1 | 0.95 % | | 1 | 0.94 % | | 7 | D C D C | 4L8A | 1 | 0.95 % | | 1 | 0.94 % | | 8 | C C D D C | OG66X | 1 | 0.95 % | | 1 | 0.94 % | |
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