| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 562 | 29.89 % | | 685 | 28.65 % | | 2 | C C D C C C | BD8DSG | 532 | 28.30 % | | 612 | 25.60 % | | 3 | C C D C | AC1U | 416 | 22.13 % | | 614 | 25.68 % | | 4 | C D C C C | D1CTT | 122 | 6.49 % | | 144 | 6.02 % | | 5 | C D C C | D1DX | 67 | 3.56 % | | 94 | 3.93 % | | 6 | C D D C C | A61EK | 35 | 1.86 % | | 46 | 1.92 % | | 7 | C D D C | A73A | 30 | 1.60 % | | 42 | 1.76 % | | 8 | D C D C C | 3V8SS | 21 | 1.12 % | | 28 | 1.17 % | | 9 | D C D C | 3Z0X | 20 | 1.06 % | | 31 | 1.30 % | | 10 | C D C | B1Z | 16 | 0.85 % | | 26 | 1.09 % | | 11 | D C D C C C | 2E0EIC | 11 | 0.59 % | | 11 | 0.46 % | | 12 | C C D D C | LY28A | 9 | 0.48 % | | 9 | 0.38 % | | 13 | C C D D D C | ES100A | 8 | 0.43 % | | 12 | 0.50 % | | 14 | C C D D C C | OH10TA | 6 | 0.32 % | | 8 | 0.33 % | | 15 | C C D C C / C | DC6FG/P | 4 | 0.21 % | | 4 | 0.17 % | | 16 | C D D C C C | E23HSW | 3 | 0.16 % | | 3 | 0.13 % | | 17 | C C D D D C C C | OE100VIE | 2 | 0.11 % | | 2 | 0.08 % | | 18 | C C D C / D | RT9K/6 | 2 | 0.11 % | | 2 | 0.08 % | | 19 | C C D / C C D C C C | CT9/CT1BWU | 2 | 0.11 % | | 2 | 0.08 % | | 20 | C C D D C C C | DM90AIW | 2 | 0.11 % | | 2 | 0.08 % | | 21 | D C D D C | 9A70A | 1 | 0.05 % | | 3 | 0.13 % | | 22 | D C D / C C D C C | 5Z4/LZ4NM | 1 | 0.05 % | | 1 | 0.04 % | | 23 | D C D D C C C | 9A60KDE | 1 | 0.05 % | | 2 | 0.08 % | | 24 | C D D D C | E770D | 1 | 0.05 % | | 1 | 0.04 % | | 25 | C C D C C C / C | DG2FDE/M | 1 | 0.05 % | | 1 | 0.04 % | | 26 | C C D D C C C C | LM90NRRL | 1 | 0.05 % | | 2 | 0.08 % | | 27 | C C D C C / C C C | ON6EB/QRP | 1 | 0.05 % | | 1 | 0.04 % | | 28 | C C D C / C | OU7M/P | 1 | 0.05 % | | 1 | 0.04 % | | 29 | D C / C C D C C C | 6W/IV3FSG | 1 | 0.05 % | | 1 | 0.04 % | | 30 | C C D C D | RZ9U0 | 1 | 0.05 % | | 1 | 0.04 % | |
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