| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BXT | 111 | 36.63 % | | 140 | 34.91 % | | 2 | C C D C C | AA4DD | 75 | 24.75 % | | 93 | 23.19 % | | 3 | C C D C | DR6T | 55 | 18.15 % | | 86 | 21.45 % | | 4 | C D C C C | F4FDR | 20 | 6.60 % | | 22 | 5.49 % | | 5 | C D C C | K1RZ | 12 | 3.96 % | | 16 | 3.99 % | | 6 | C D D C | E72U | 7 | 2.31 % | | 7 | 1.75 % | | 7 | C C D D C C | AO75AR | 5 | 1.65 % | | 11 | 2.74 % | | 8 | D C D C | 7S5S | 5 | 1.65 % | | 8 | 2.00 % | | 9 | D C D C C C | 2E0CVN | 4 | 1.32 % | | 4 | 1.00 % | | 10 | C D C | M1V | 3 | 0.99 % | | 5 | 1.25 % | | 11 | C C D D C C C | AO75URE | 2 | 0.66 % | | 5 | 1.25 % | | 12 | C D D C C | E77EA | 2 | 0.66 % | | 2 | 0.50 % | | 13 | C C / C C D C C | EA/DL5EO | 1 | 0.33 % | | 1 | 0.25 % | | 14 | C D C C C D D | M3AWD27 | 1 | 0.33 % | | 1 | 0.25 % | |
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