| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CN3A | 49 | 52.13 % | | 52 | 52.00 % | | 2 | C C D C C | CN2AA | 19 | 20.21 % | | 19 | 19.00 % | | 3 | C C D C C C | IK3UNA | 7 | 7.45 % | | 7 | 7.00 % | | 4 | D C D C | 4X7R | 4 | 4.26 % | | 4 | 4.00 % | | 5 | C D C C | N2MM | 3 | 3.19 % | | 3 | 3.00 % | | 6 | D C D C C | 3V8SS | 3 | 3.19 % | | 4 | 4.00 % | | 7 | C D D C C | S54ZZ | 3 | 3.19 % | | 3 | 3.00 % | | 8 | C D D C | C44C | 2 | 2.13 % | | 3 | 3.00 % | | 9 | C D C | C4A | 2 | 2.13 % | | 3 | 3.00 % | | 10 | C C D D C | PG90T | 1 | 1.06 % | | 1 | 1.00 % | | 11 | C C D D D C | ES100O | 1 | 1.06 % | | 1 | 1.00 % | |
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