| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C | AA3B | 64 | 36.57 % | | 74 | 38.54 % | | 2 | C C D C C | AA5AU | 46 | 26.29 % | | 51 | 26.56 % | | 3 | C C D C C C | CT1BXT | 28 | 16.00 % | | 28 | 14.58 % | | 4 | C D C C | K1SM | 10 | 5.71 % | | 12 | 6.25 % | | 5 | C D C C C | F4ERS | 8 | 4.57 % | | 8 | 4.17 % | | 6 | C D D C | C37N | 5 | 2.86 % | | 5 | 2.60 % | | 7 | D C D C | 4L8A | 4 | 2.29 % | | 4 | 2.08 % | | 8 | C D C | G1N | 4 | 2.29 % | | 4 | 2.08 % | | 9 | C C D D C | OG66X | 2 | 1.14 % | | 2 | 1.04 % | | 10 | D C D C C C | 2E0INN | 1 | 0.57 % | | 1 | 0.52 % | | 11 | C C D D C C | LZ50YE | 1 | 0.57 % | | 1 | 0.52 % | | 12 | C C D C C C C | II3WRTC | 1 | 0.57 % | | 1 | 0.52 % | | 13 | C D D C C | S51CK | 1 | 0.57 % | | 1 | 0.52 % | |
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