| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | CR3DX | 49 | 42.61 % | | 79 | 45.93 % | | 2 | C C D C | CR6K | 29 | 25.22 % | | 39 | 22.67 % | | 3 | C C D C C C | IK0PHY | 16 | 13.91 % | | 22 | 12.79 % | | 4 | C D C C C | F1DHX | 9 | 7.83 % | | 16 | 9.30 % | | 5 | C D C C | E7HQ | 3 | 2.61 % | | 3 | 1.74 % | | 6 | C D D C C | S50HQ | 2 | 1.74 % | | 3 | 1.74 % | | 7 | D C D C C | 4X6FR | 2 | 1.74 % | | 2 | 1.16 % | | 8 | D C D C | 4U1A | 1 | 0.87 % | | 1 | 0.58 % | | 9 | C D C | C4W | 1 | 0.87 % | | 1 | 0.58 % | | 10 | C C D C C C C | II4WRTC | 1 | 0.87 % | | 2 | 1.16 % | | 11 | C C D / C C D C C C | IT9/IZ2WFL | 1 | 0.87 % | | 1 | 0.58 % | | 12 | C C D / C C D C C | IS0/ON4EI | 1 | 0.87 % | | 3 | 1.74 % | |
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