| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | DF1MM | 43 | 34.96 % | | 47 | 35.07 % | | 2 | C C D C | CR6K | 37 | 30.08 % | | 41 | 30.60 % | | 3 | C C D C C C | DL3KWF | 19 | 15.45 % | | 19 | 14.18 % | | 4 | C D D C | E72U | 9 | 7.32 % | | 9 | 6.72 % | | 5 | C D C C C | F8DGY | 5 | 4.07 % | | 5 | 3.73 % | | 6 | C D D C C | S57AL | 3 | 2.44 % | | 5 | 3.73 % | | 7 | C D C C | R7AM | 3 | 2.44 % | | 4 | 2.99 % | | 8 | D C D C C | 9A4WY | 1 | 0.81 % | | 1 | 0.75 % | | 9 | C D C | M4N | 1 | 0.81 % | | 1 | 0.75 % | | 10 | D C D C | 9A7R | 1 | 0.81 % | | 1 | 0.75 % | | 11 | D C D C C C | 9A3SMS | 1 | 0.81 % | | 1 | 0.75 % | |
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