| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BH4OUF | 529 | 35.55 % | | 677 | 33.85 % | | 2 | C C D C C | AA2MF | 438 | 29.44 % | | 602 | 30.10 % | | 3 | C C D C | AA3B | 241 | 16.20 % | | 355 | 17.75 % | | 4 | C D C C C | F1HMR | 116 | 7.80 % | | 148 | 7.40 % | | 5 | C D C C | C5YK | 72 | 4.84 % | | 101 | 5.05 % | | 6 | C D D C | A96A | 14 | 0.94 % | | 19 | 0.95 % | | 7 | D C D C | 3Z6O | 10 | 0.67 % | | 14 | 0.70 % | | 8 | C D C | G0C | 9 | 0.60 % | | 10 | 0.50 % | | 9 | C D D C C | E77EA | 9 | 0.60 % | | 10 | 0.50 % | | 10 | D C D C C C | 2E0CVN | 8 | 0.54 % | | 8 | 0.40 % | | 11 | C C D D C C C | CS25FOQ | 8 | 0.54 % | | 12 | 0.60 % | | 12 | D C D C C | 4Z4DX | 6 | 0.40 % | | 6 | 0.30 % | | 13 | C D D C C C | C37URA | 4 | 0.27 % | | 4 | 0.20 % | | 14 | C C D C C C / C C C | EA5HRT/QRP | 3 | 0.20 % | | 3 | 0.15 % | | 15 | C C D D C C | OG95AA | 3 | 0.20 % | | 5 | 0.25 % | | 16 | C C D D D D C | DM2025C | 2 | 0.13 % | | 3 | 0.15 % | | 17 | C D C C C / C | G4NXG/M | 2 | 0.13 % | | 2 | 0.10 % | | 18 | C C D D D C | HF100S | 2 | 0.13 % | | 2 | 0.10 % | | 19 | C C D C C C / D | IT9RGY/4 | 2 | 0.13 % | | 3 | 0.15 % | | 20 | C C D C C / C C C | EA1GT/QRP | 1 | 0.07 % | | 2 | 0.10 % | | 21 | C C D D C C C C | HF40STOK | 1 | 0.07 % | | 2 | 0.10 % | | 22 | C C D / C C D C | HL2/KC6G | 1 | 0.07 % | | 1 | 0.05 % | | 23 | C C D / C D C C C | KP4/K6DTT | 1 | 0.07 % | | 1 | 0.05 % | | 24 | C C D C C C C | LX5IGRY | 1 | 0.07 % | | 3 | 0.15 % | | 25 | C D D C C / C C C | A71AE/QRP | 1 | 0.07 % | | 1 | 0.05 % | | 26 | C C D C C C C C | OU0POLIO | 1 | 0.07 % | | 1 | 0.05 % | | 27 | C D D D C C C | S549APR | 1 | 0.07 % | | 3 | 0.15 % | | 28 | C C D C C C C C C | SN0UNESCO | 1 | 0.07 % | | 1 | 0.05 % | | 29 | C D C C / D | W9OA/9 | 1 | 0.07 % | | 1 | 0.05 % | |
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