| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AC1U | 115 | 43.07 % | | 127 | 44.10 % | | 2 | C C D C C | BD7MM | 56 | 20.97 % | | 58 | 20.14 % | | 3 | C C D C C C | CS5GCB | 47 | 17.60 % | | 48 | 16.67 % | | 4 | C D D C | A44A | 12 | 4.49 % | | 15 | 5.21 % | | 5 | C D D C C | A61QQ | 8 | 3.00 % | | 9 | 3.13 % | | 6 | D C D C | 3Z6V | 7 | 2.62 % | | 7 | 2.43 % | | 7 | C D C | B7P | 5 | 1.87 % | | 7 | 2.43 % | | 8 | D C D C C | 4X6FR | 5 | 1.87 % | | 5 | 1.74 % | | 9 | C D C C | E7DX | 3 | 1.12 % | | 3 | 1.04 % | | 10 | D C D D C | 9A23Y | 2 | 0.75 % | | 2 | 0.69 % | | 11 | D C / C C D C C C | 3A/IK1TTD | 1 | 0.37 % | | 1 | 0.35 % | | 12 | D C D C C C | 4I1EBD | 1 | 0.37 % | | 1 | 0.35 % | | 13 | C C D D D C | LN100K | 1 | 0.37 % | | 1 | 0.35 % | | 14 | C C D D C | OG73X | 1 | 0.37 % | | 1 | 0.35 % | | 15 | C D C C C | R3DCB | 1 | 0.37 % | | 1 | 0.35 % | | 16 | C D D D C C C C | S509WRTC | 1 | 0.37 % | | 1 | 0.35 % | | 17 | C C D D D C C | TC100TA | 1 | 0.37 % | | 1 | 0.35 % | |
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