| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4CF | 591 | 33.18 % | | 785 | 33.40 % | | 2 | C C D C C C | CT1BOH | 471 | 26.45 % | | 578 | 24.60 % | | 3 | C C D C | AC5K | 363 | 20.38 % | | 541 | 23.02 % | | 4 | C D C C | D1AZ | 108 | 6.06 % | | 121 | 5.15 % | | 5 | C D C C C | F5ICC | 91 | 5.11 % | | 107 | 4.55 % | | 6 | C D D C | E72U | 39 | 2.19 % | | 65 | 2.77 % | | 7 | C D D C C | A65CA | 23 | 1.29 % | | 29 | 1.23 % | | 8 | D C D C C | 4O4SM | 22 | 1.24 % | | 27 | 1.15 % | | 9 | D C D C | 4O4A | 11 | 0.62 % | | 21 | 0.89 % | | 10 | C D C | G4R | 10 | 0.56 % | | 12 | 0.51 % | | 11 | C C D D C | OF10A | 6 | 0.34 % | | 6 | 0.26 % | | 12 | C C D C C C / C | DG3LSM/P | 5 | 0.28 % | | 5 | 0.21 % | | 13 | C D D C C C | E73ESP | 4 | 0.22 % | | 6 | 0.26 % | | 14 | D C D C C C | 2E0CVN | 4 | 0.22 % | | 4 | 0.17 % | | 15 | C C D D D C | PA125V | 3 | 0.17 % | | 4 | 0.17 % | | 16 | C C D D C C | LZ45YE | 3 | 0.17 % | | 3 | 0.13 % | | 17 | C C / C C D C C | OZ/DJ5LA | 2 | 0.11 % | | 2 | 0.09 % | | 18 | C C D / C C D C C | EA5/DK5IM | 2 | 0.11 % | | 4 | 0.17 % | | 19 | C C / C C D C C C | OK/DL2DXA | 2 | 0.11 % | | 2 | 0.09 % | | 20 | C C D D C C C | DL40MFR | 2 | 0.11 % | | 4 | 0.17 % | | 21 | C C D C C / D | RA3BQ/3 | 2 | 0.11 % | | 3 | 0.13 % | | 22 | C / C D C C C | F/G4BJM | 1 | 0.06 % | | 1 | 0.04 % | | 23 | C D C C C / C | F5VHE/P | 1 | 0.06 % | | 1 | 0.04 % | | 24 | C C D D D D C | DM1517L | 1 | 0.06 % | | 1 | 0.04 % | | 25 | C / C C D C C | F/SQ6MS | 1 | 0.06 % | | 2 | 0.09 % | | 26 | C C D D D C C | DL500ML | 1 | 0.06 % | | 2 | 0.09 % | | 27 | C C D / C D C C | CT9/R7KW | 1 | 0.06 % | | 1 | 0.04 % | | 28 | C C / C D C C | EI/W5GN | 1 | 0.06 % | | 1 | 0.04 % | | 29 | C C D C C C C | DF0WRTC | 1 | 0.06 % | | 3 | 0.13 % | | 30 | C C D C C / C | OZ7BQ/P | 1 | 0.06 % | | 1 | 0.04 % | | 31 | D C D C C C / D | 7K1MAG/2 | 1 | 0.06 % | | 1 | 0.04 % | | 32 | C C D D D C C C | PA150LIM | 1 | 0.06 % | | 1 | 0.04 % | | 33 | C D D D D C C | R2017CC | 1 | 0.06 % | | 1 | 0.04 % | | 34 | C C D C C C / D | JF3GFH/1 | 1 | 0.06 % | | 1 | 0.04 % | | 35 | C C D / C C D C C / C | SV2/SV1RP/A | 1 | 0.06 % | | 1 | 0.04 % | | 36 | C C D C C / C C | YL3IZ/MM | 1 | 0.06 % | | 1 | 0.04 % | | 37 | C C D C C / C C C | YU1LM/QRP | 1 | 0.06 % | | 1 | 0.04 % | | 38 | C C / C C D C | ZA/OU2I | 1 | 0.06 % | | 1 | 0.04 % | |
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