| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | CE3CBM | 1429 | 25.27 % | | 2072 | 19.70 % | | 2 | C C D C C | AA0AI | 1181 | 20.88 % | | 1989 | 18.91 % | | 3 | C D C C | D1DX | 1019 | 18.02 % | | 2481 | 23.59 % | | 4 | C C D C | AA0O | 1006 | 17.79 % | | 2171 | 20.64 % | | 5 | C D C C C | C6AGU | 747 | 13.21 % | | 1349 | 12.83 % | | 6 | C D D C C | A45XR | 54 | 0.95 % | | 80 | 0.76 % | | 7 | C D D C | A44A | 53 | 0.94 % | | 110 | 1.05 % | | 8 | D C D C | 3B8M | 35 | 0.62 % | | 70 | 0.67 % | | 9 | D C D C C | 3E1FP | 34 | 0.60 % | | 52 | 0.49 % | | 10 | C D C | C4W | 30 | 0.53 % | | 47 | 0.45 % | | 11 | D C D C C C | 2E0CVN | 13 | 0.23 % | | 16 | 0.15 % | | 12 | C C D / C C D C | DV8/KH7V | 6 | 0.11 % | | 8 | 0.08 % | | 13 | C C D C C C / D | IK1ZOF/3 | 5 | 0.09 % | | 7 | 0.07 % | | 14 | C D / C C D C | V4/WX4G | 3 | 0.05 % | | 3 | 0.03 % | | 15 | C C D C / D | AI0Y/9 | 3 | 0.05 % | | 6 | 0.06 % | | 16 | C C D C C / C C C | HZ1TT/QRP | 2 | 0.04 % | | 2 | 0.02 % | | 17 | C C D C C / D | AB5ZA/7 | 2 | 0.04 % | | 3 | 0.03 % | | 18 | C D C C C / C | F4HYJ/P | 2 | 0.04 % | | 2 | 0.02 % | | 19 | C C D / C C D C C C | EA8/IK1PMR | 2 | 0.04 % | | 4 | 0.04 % | | 20 | C C D / C C D C C | EA8/OK2GG | 2 | 0.04 % | | 2 | 0.02 % | | 21 | C C D D C C C | HB90TOC | 2 | 0.04 % | | 4 | 0.04 % | | 22 | C C / C D C C C | FO/F6BCW | 2 | 0.04 % | | 3 | 0.03 % | | 23 | D C / C C D C C | 5B/RN3QO | 2 | 0.04 % | | 5 | 0.05 % | | 24 | C D D C C C | S57NAW | 2 | 0.04 % | | 3 | 0.03 % | | 25 | C C D C C / C D | KH6KG/W5 | 2 | 0.04 % | | 6 | 0.06 % | | 26 | C D C C / D | K0XB/6 | 2 | 0.04 % | | 3 | 0.03 % | | 27 | D C D C C C / D | 7K1MAG/2 | 1 | 0.02 % | | 1 | 0.01 % | | 28 | C C D C C C / C C | IU1DUB/MM | 1 | 0.02 % | | 1 | 0.01 % | | 29 | D C D / C C D C C | 8R1/AG6UT | 1 | 0.02 % | | 1 | 0.01 % | | 30 | C C D C / C D | KL2A/W3 | 1 | 0.02 % | | 1 | 0.01 % | | 31 | C C / C D C C | MW/R6AF | 1 | 0.02 % | | 3 | 0.03 % | | 32 | C C D C C C D D | OH7GGX15 | 1 | 0.02 % | | 1 | 0.01 % | | 33 | C C / C C D C C | OK/LZ3SF | 1 | 0.02 % | | 1 | 0.01 % | | 34 | D C D D C | 4U25B | 1 | 0.02 % | | 2 | 0.02 % | | 35 | C C D D C C | TM20CI | 1 | 0.02 % | | 3 | 0.03 % | | 36 | C C D C C / C | UX1HW/M | 1 | 0.02 % | | 1 | 0.01 % | | 37 | C C D C D D | IU3B58 | 1 | 0.02 % | | 1 | 0.01 % | | 38 | C D / C D D C C | W2/E78WW | 1 | 0.02 % | | 1 | 0.01 % | | 39 | C D / C C D C C C | W2/SM5DRW | 1 | 0.02 % | | 1 | 0.01 % | | 40 | C D / C D C C | W4/G8HI | 1 | 0.02 % | | 1 | 0.01 % | | 41 | C C D C C / C C | YL3IZ/MM | 1 | 0.02 % | | 1 | 0.01 % | |
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