| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | K0EOR | 45 | 30.20 % | | 45 | 28.30 % | | 2 | C D C C | K0NC | 39 | 26.17 % | | 40 | 25.16 % | | 3 | C C D C C C | KA3UIP | 33 | 22.15 % | | 35 | 22.01 % | | 4 | C C D C C | AA4DD | 16 | 10.74 % | | 16 | 10.06 % | | 5 | C C D C | AF2A | 14 | 9.40 % | | 15 | 9.43 % | | 6 | C D C | W2C | 2 | 1.34 % | | 3 | 1.89 % | |
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