| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C C | F4HZZ | 252 | 24.85 % | | 300 | 23.15 % | | 2 | C C D C C C | DL2HWI | 247 | 24.36 % | | 276 | 21.30 % | | 3 | C D C C | K0EJ | 238 | 23.47 % | | 355 | 27.39 % | | 4 | C C D C C | AA0HD | 135 | 13.31 % | | 177 | 13.66 % | | 5 | C C D C | AA3B | 113 | 11.14 % | | 156 | 12.04 % | | 6 | C D C | K4D | 8 | 0.79 % | | 10 | 0.77 % | | 7 | C D C C / D | K2MK/4 | 4 | 0.39 % | | 4 | 0.31 % | | 8 | C D C C C / C C C | N3WER/QRP | 3 | 0.30 % | | 3 | 0.23 % | | 9 | C D C C C / D | K1DAT/1 | 2 | 0.20 % | | 2 | 0.15 % | | 10 | C C D C C / C C C | AD4ES/IDR | 2 | 0.20 % | | 2 | 0.15 % | | 11 | C C D C C C / C | KB1JZR/M | 2 | 0.20 % | | 2 | 0.15 % | | 12 | C D C C C C | K0FGMO | 1 | 0.10 % | | 1 | 0.08 % | | 13 | C C D C C / C | AB7RW/M | 1 | 0.10 % | | 1 | 0.08 % | | 14 | C C D C C C / C C C | KD2KOG/QRP | 1 | 0.10 % | | 1 | 0.08 % | | 15 | C C D C C C / C C D | KK4DCX/KP4 | 1 | 0.10 % | | 1 | 0.08 % | | 16 | C D C C / C C C | K4OJ/LAK | 1 | 0.10 % | | 1 | 0.08 % | | 17 | C D D C | S55N | 1 | 0.10 % | | 1 | 0.08 % | | 18 | C D / C D C C C | W9/F5IDM | 1 | 0.10 % | | 1 | 0.08 % | | 19 | C C D C C C / D | WA5DTK/0 | 1 | 0.10 % | | 2 | 0.15 % | |
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