| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BD4TSK | 1418 | 32.60 % | | 2409 | 28.00 % | | 2 | C C D C C | AB1JV | 1233 | 28.34 % | | 2564 | 29.80 % | | 3 | C C D C | AB1F | 530 | 12.18 % | | 1412 | 16.41 % | | 4 | C D C C C | F1AGR | 517 | 11.89 % | | 798 | 9.27 % | | 5 | C D C C | B4HQ | 349 | 8.02 % | | 669 | 7.78 % | | 6 | D C D C C | 2E0BT | 47 | 1.08 % | | 96 | 1.12 % | | 7 | D C D C C C | 2D0MGV | 46 | 1.06 % | | 62 | 0.72 % | | 8 | C D D C C | A47HQ | 37 | 0.85 % | | 106 | 1.23 % | | 9 | C D D C | E70X | 23 | 0.53 % | | 60 | 0.70 % | | 10 | D C D C | 3G3W | 23 | 0.53 % | | 64 | 0.74 % | | 11 | C D C | D4K | 21 | 0.48 % | | 51 | 0.59 % | | 12 | C C D C C C C | DG5OALV | 10 | 0.23 % | | 22 | 0.26 % | | 13 | C C D C C C / C | DL2DXA/P | 10 | 0.23 % | | 13 | 0.15 % | | 14 | C D C C C / C | F4JIK/P | 8 | 0.18 % | | 9 | 0.10 % | | 15 | C D D C C C | E20XMG | 7 | 0.16 % | | 10 | 0.12 % | | 16 | C C D C C / C | DB3KO/P | 5 | 0.11 % | | 5 | 0.06 % | | 17 | C C D D C C C | DM60UEA | 5 | 0.11 % | | 10 | 0.12 % | | 18 | C C D / C C D C C C | HI9/IZ2KTE | 4 | 0.09 % | | 9 | 0.10 % | | 19 | C C D C C C / C C C | DL1EST/QPR | 4 | 0.09 % | | 4 | 0.05 % | | 20 | C C D D C C | DB40NK | 4 | 0.09 % | | 4 | 0.05 % | | 21 | C C / C C D C C C | EW/DL7VFM | 4 | 0.09 % | | 5 | 0.06 % | | 22 | C C D C C / D | IQ4FE/4 | 4 | 0.09 % | | 4 | 0.05 % | | 23 | D C / C D D C C | 9A/S51RE | 3 | 0.07 % | | 6 | 0.07 % | | 24 | C C D C C / C C | DM1WA/OZ | 2 | 0.05 % | | 2 | 0.02 % | | 25 | D C D C C C / C | 2E0HSP/P | 2 | 0.05 % | | 2 | 0.02 % | | 26 | C D C C / D | K2KJ/1 | 2 | 0.05 % | | 9 | 0.10 % | | 27 | C D C C C C | E2WRTC | 2 | 0.05 % | | 4 | 0.05 % | | 28 | D C D D C | 9A22Y | 2 | 0.05 % | | 8 | 0.09 % | | 29 | D C C C C | 2ECVN | 2 | 0.05 % | | 2 | 0.02 % | | 30 | C C D C C C / D | KB6QPI/4 | 2 | 0.05 % | | 2 | 0.02 % | | 31 | C C D D D D C C | SN1921PS | 2 | 0.05 % | | 4 | 0.05 % | | 32 | C C / C C D C C | OE/DJ3AK | 2 | 0.05 % | | 2 | 0.02 % | | 33 | C D / C D D C | E7/Z35M | 1 | 0.02 % | | 1 | 0.01 % | | 34 | C C D C / C C C | DM2X/QRP | 1 | 0.02 % | | 1 | 0.01 % | | 35 | D C D C D | 9A0H3 | 1 | 0.02 % | | 1 | 0.01 % | | 36 | C C D | IO9 | 1 | 0.02 % | | 1 | 0.01 % | | 37 | D C C C | 4XDX | 1 | 0.02 % | | 1 | 0.01 % | | 38 | C C / C D C C C / C | DL/F4EPU/P | 1 | 0.02 % | | 2 | 0.02 % | | 39 | C C D D D C C C | GB100BBC | 1 | 0.02 % | | 1 | 0.01 % | | 40 | C C D / C D C C C | KP4/K6DTT | 1 | 0.02 % | | 1 | 0.01 % | | 41 | D C / C C D C C | 9A/OK1LI | 1 | 0.02 % | | 1 | 0.01 % | | 42 | C C D D C | PF00T | 1 | 0.02 % | | 4 | 0.05 % | | 43 | C C D C / D | RG5A/6 | 1 | 0.02 % | | 5 | 0.06 % | | 44 | C C D C D D C | RM3D29A | 1 | 0.02 % | | 1 | 0.01 % | | 45 | C D / C D C C C | S5/M0MPM | 1 | 0.02 % | | 2 | 0.02 % | | 46 | C D D D C C | S503MM | 1 | 0.02 % | | 1 | 0.01 % | | 47 | C / C C D C C C | I/DL5AZZ | 1 | 0.02 % | | 1 | 0.01 % | | 48 | C C D D D C C | SO200IL | 1 | 0.02 % | | 1 | 0.01 % | | 49 | C C D / C C D C C / C | SP1/UX1HW/M | 1 | 0.02 % | | 2 | 0.02 % | | 50 | C C D C C C D D | SP4JFR28 | 1 | 0.02 % | | 1 | 0.01 % | | 51 | C D C C C / D | W9BIK/1 | 1 | 0.02 % | | 1 | 0.01 % | | 52 | C C D C C / C C C | YU1LM/QRP | 1 | 0.02 % | | 4 | 0.05 % | |
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