| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CT1BXT | 282 | 23.54 % | | 316 | 20.68 % | | 2 | C D C C C | F4HZZ | 254 | 21.20 % | | 294 | 19.24 % | | 3 | C C D C C | AA4MY | 236 | 19.70 % | | 324 | 21.20 % | | 4 | C D C C | E7DX | 215 | 17.95 % | | 293 | 19.18 % | | 5 | C C D C | AA0O | 183 | 15.28 % | | 252 | 16.49 % | | 6 | D C D C C | 3D2AG | 9 | 0.75 % | | 12 | 0.79 % | | 7 | C D C | I3R | 4 | 0.33 % | | 7 | 0.46 % | | 8 | C D D C C | S50HQ | 4 | 0.33 % | | 11 | 0.72 % | | 9 | C D D C | S53A | 2 | 0.17 % | | 2 | 0.13 % | | 10 | C C D C C / D | NU1AW/5 | 2 | 0.17 % | | 7 | 0.46 % | | 11 | C D C C / D | K2NV/2 | 2 | 0.17 % | | 2 | 0.13 % | | 12 | D C / C D C C | 9A/K7GM | 1 | 0.08 % | | 1 | 0.07 % | | 13 | C C D C C C C | II4WRTC | 1 | 0.08 % | | 1 | 0.07 % | | 14 | C C D C C C / C C | KK4FML/AG | 1 | 0.08 % | | 1 | 0.07 % | | 15 | C C D D D C C | SH230BO | 1 | 0.08 % | | 1 | 0.07 % | | 16 | C D C C / C C D | W1AW/KL7 | 1 | 0.08 % | | 4 | 0.26 % | |
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