| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K1MD | 27 | 33.75 % | | 27 | 32.53 % | | 2 | C D C C C | K0AJW | 25 | 31.25 % | | 25 | 30.12 % | | 3 | C C D C | AA9H | 10 | 12.50 % | | 10 | 12.05 % | | 4 | C C D C C C | KA9BHD | 8 | 10.00 % | | 8 | 9.64 % | | 5 | C C D C C | AA8LF | 7 | 8.75 % | | 7 | 8.43 % | | 6 | C D C | N3A | 3 | 3.75 % | | 3 | 3.61 % | |
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