| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | CR3DX | 33 | 32.35 % | | 34 | 33.01 % | | 2 | C C D C | CR3W | 27 | 26.47 % | | 27 | 26.21 % | | 3 | C C D C C C | CS5CRE | 17 | 16.67 % | | 17 | 16.50 % | | 4 | C D D C | E79Q | 8 | 7.84 % | | 8 | 7.77 % | | 5 | C D C C C | F5NBX | 5 | 4.90 % | | 5 | 4.85 % | | 6 | C D C | G2F | 3 | 2.94 % | | 3 | 2.91 % | | 7 | D C D C | 9A1A | 2 | 1.96 % | | 2 | 1.94 % | | 8 | C D C C | R7AB | 2 | 1.96 % | | 2 | 1.94 % | | 9 | D C D C C C | 4O4YCP | 1 | 0.98 % | | 1 | 0.97 % | | 10 | C C D D C C C | OE18SGU | 1 | 0.98 % | | 1 | 0.97 % | | 11 | C C D D D C C C | OL100CSR | 1 | 0.98 % | | 1 | 0.97 % | | 12 | C C D C C C / D | IT9RGY/4 | 1 | 0.98 % | | 1 | 0.97 % | | 13 | C D D C C | S51CK | 1 | 0.98 % | | 1 | 0.97 % | |
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