| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | AE4GTY | 667 | 40.77 % | | 843 | 41.34 % | | 2 | C C D C C | AA1ZT | 468 | 28.61 % | | 603 | 29.57 % | | 3 | C D C C C | F1FJT | 207 | 12.65 % | | 239 | 11.72 % | | 4 | C D C C | F2LG | 101 | 6.17 % | | 114 | 5.59 % | | 5 | C C D C | AA7G | 81 | 4.95 % | | 99 | 4.86 % | | 6 | D C D C C C | 2E0CVN | 19 | 1.16 % | | 22 | 1.08 % | | 7 | D C D C C | 0H3GZ | 19 | 1.16 % | | 25 | 1.23 % | | 8 | C D D C C | A41NN | 9 | 0.55 % | | 12 | 0.59 % | | 9 | C C D C C C / C C C | DL5ALI/QRP | 9 | 0.55 % | | 17 | 0.83 % | | 10 | C C D D D C | ES100C | 7 | 0.43 % | | 7 | 0.34 % | | 11 | C D D C | E23N | 4 | 0.24 % | | 10 | 0.49 % | | 12 | C C D C C / D | IQ2VA/1 | 4 | 0.24 % | | 4 | 0.20 % | | 13 | C D C C C / C C C | G4JQT/QRP | 4 | 0.24 % | | 4 | 0.20 % | | 14 | C C D C C / C C C | LZ2BV/QRP | 3 | 0.18 % | | 3 | 0.15 % | | 15 | D C D C | 4J5A | 2 | 0.12 % | | 2 | 0.10 % | | 16 | C C D C C C / D | IU4DIN/8 | 2 | 0.12 % | | 2 | 0.10 % | | 17 | C C D C C C / C | EA9ABC/P | 2 | 0.12 % | | 2 | 0.10 % | | 18 | C C D D C C C | DM90AIW | 2 | 0.12 % | | 3 | 0.15 % | | 19 | C C D / C C D C C C | CT7/ON4KDE | 2 | 0.12 % | | 2 | 0.10 % | | 20 | C C D C C / C | DF9ZV/P | 2 | 0.12 % | | 2 | 0.10 % | | 21 | C D C C / D | N9EN/4 | 2 | 0.12 % | | 2 | 0.10 % | | 22 | C C D D C | OZ11A | 2 | 0.12 % | | 2 | 0.10 % | | 23 | C D / C C D C C | I0/YO3XX | 2 | 0.12 % | | 2 | 0.10 % | | 24 | C D D C / C C C | S55N/QRP | 2 | 0.12 % | | 2 | 0.10 % | | 25 | C D D C C C | S56ECR | 2 | 0.12 % | | 2 | 0.10 % | | 26 | C C D C C C D D | LZ1LDH59 | 1 | 0.06 % | | 1 | 0.05 % | | 27 | C C D / C D C C C | CT7/F6HBR | 1 | 0.06 % | | 3 | 0.15 % | | 28 | C C / C C D C C | DL/OH2KM | 1 | 0.06 % | | 1 | 0.05 % | | 29 | C D C C C / C | F5NZO/P | 1 | 0.06 % | | 1 | 0.05 % | | 30 | C C / C C D C C C | OE/DD8ALO | 1 | 0.06 % | | 1 | 0.05 % | | 31 | D C D C C / C C C | 9H5II/QRP | 1 | 0.06 % | | 1 | 0.05 % | | 32 | C / C C D C C C | M/YO4HGX | 1 | 0.06 % | | 1 | 0.05 % | | 33 | C C D / C C D C C | EA8/DK6TR | 1 | 0.06 % | | 1 | 0.05 % | | 34 | C C D D D C C C | SN100ZHP | 1 | 0.06 % | | 1 | 0.05 % | | 35 | C C / C D C C C | SP/I4ZSQ | 1 | 0.06 % | | 1 | 0.05 % | | 36 | C C D C C / C C | UT1FG/MM | 1 | 0.06 % | | 1 | 0.05 % | | 37 | C C D / C C C C | ZS1/RICC | 1 | 0.06 % | | 1 | 0.05 % | |
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