| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0BFT | 13 | 52.00 % | | 13 | 52.00 % | | 2 | C D C C | N9RP | 4 | 16.00 % | | 4 | 16.00 % | | 3 | C C D C C C | KD0IRF | 3 | 12.00 % | | 3 | 12.00 % | | 4 | C C D C | AB0R | 2 | 8.00 % | | 2 | 8.00 % | | 5 | C C D C C | AA4LR | 2 | 8.00 % | | 2 | 8.00 % | | 6 | C D C | K4R | 1 | 4.00 % | | 1 | 4.00 % | |
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