| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | CQ3W | 53 | 41.41 % | | 57 | 43.18 % | | 2 | C C D C C | CT3KN | 30 | 23.44 % | | 30 | 22.73 % | | 3 | C C D C C C | CT1DIZ | 27 | 21.09 % | | 27 | 20.45 % | | 4 | C D C C | E7DX | 7 | 5.47 % | | 7 | 5.30 % | | 5 | C D C C C | F4EMI | 6 | 4.69 % | | 6 | 4.55 % | | 6 | C D C | G3M | 2 | 1.56 % | | 2 | 1.52 % | | 7 | C C D D C | OG66X | 1 | 0.78 % | | 1 | 0.76 % | | 8 | C C D C C C / D | RA4LBS/3 | 1 | 0.78 % | | 1 | 0.76 % | | 9 | C D D C C | S51CK | 1 | 0.78 % | | 1 | 0.76 % | |
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