| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | F5IN | 135 | 29.54 % | | 205 | 33.01 % | | 2 | C C D C C | AA3AH | 92 | 20.13 % | | 130 | 20.93 % | | 3 | C C D C | AA2L | 87 | 19.04 % | | 124 | 19.97 % | | 4 | C C D C C C | BD4TUC | 85 | 18.60 % | | 93 | 14.98 % | | 5 | C D C C C | F6HKA | 48 | 10.50 % | | 56 | 9.02 % | | 6 | C D C | E2A | 2 | 0.44 % | | 2 | 0.32 % | | 7 | D C D C C | 8N1HQ | 2 | 0.44 % | | 2 | 0.32 % | | 8 | D C D C C C | 7K4AEA | 1 | 0.22 % | | 1 | 0.16 % | | 9 | C C D C C C / D | JA3GZE/1 | 1 | 0.22 % | | 1 | 0.16 % | | 10 | C C D C C / C D | KH6KG/W5 | 1 | 0.22 % | | 1 | 0.16 % | | 11 | C D D C | L33M | 1 | 0.22 % | | 1 | 0.16 % | | 12 | C D D C C | S50HQ | 1 | 0.22 % | | 1 | 0.16 % | | 13 | C D C C / D | W1AW/4 | 1 | 0.22 % | | 4 | 0.64 % | |
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