| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C D C C | K0IP | 85 | 23.48 % | | 102 | 25.00 % | | 2 | C D C C C | F4ESV | 75 | 20.72 % | | 78 | 19.12 % | | 3 | C C D C | AA0O | 75 | 20.72 % | | 84 | 20.59 % | | 4 | C C D C C | AA0AW | 70 | 19.34 % | | 83 | 20.34 % | | 5 | C C D C C C | IK1TAZ | 51 | 14.09 % | | 55 | 13.48 % | | 6 | C C D C / D | AI0Y/9 | 2 | 0.55 % | | 2 | 0.49 % | | 7 | C D D C | P49X | 2 | 0.55 % | | 2 | 0.49 % | | 8 | C D / C D D C | P4/S50N | 1 | 0.28 % | | 1 | 0.25 % | | 9 | C D C C C C | W2ORIL | 1 | 0.28 % | | 1 | 0.25 % | |
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