| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | CN2DD | 180 | 31.30 % | | 206 | 29.30 % | | 2 | C C D C | AC1U | 165 | 28.70 % | | 224 | 31.86 % | | 3 | C C D C C C | DC0NAC | 99 | 17.22 % | | 102 | 14.51 % | | 4 | C D C C | E7CW | 25 | 4.35 % | | 28 | 3.98 % | | 5 | C D D C | A52R | 23 | 4.00 % | | 32 | 4.55 % | | 6 | C D C C C | F5IQJ | 20 | 3.48 % | | 22 | 3.13 % | | 7 | C D D C C | E77AA | 13 | 2.26 % | | 17 | 2.42 % | | 8 | D C D C C | 4X6FR | 10 | 1.74 % | | 10 | 1.42 % | | 9 | D C D C | 3Z6I | 10 | 1.74 % | | 18 | 2.56 % | | 10 | C C D D C C C | DL80FOC | 6 | 1.04 % | | 8 | 1.14 % | | 11 | C C D D C | LZ11C | 4 | 0.70 % | | 4 | 0.57 % | | 12 | C D C | G5O | 4 | 0.70 % | | 7 | 1.00 % | | 13 | C C / C C D C C | EA/KH2BY | 2 | 0.35 % | | 2 | 0.28 % | | 14 | D C D C C C | 4U1ITU | 2 | 0.35 % | | 2 | 0.28 % | | 15 | C C D / C C D C C | EA1/DH1TW | 2 | 0.35 % | | 4 | 0.57 % | | 16 | C C D C C C / C C C | IK3TZB/QRP | 2 | 0.35 % | | 2 | 0.28 % | | 17 | D C D D C | 9A70A | 1 | 0.17 % | | 3 | 0.43 % | | 18 | C C D D C C | HG10CC | 1 | 0.17 % | | 1 | 0.14 % | | 19 | C C D C C C C | DA0WRTC | 1 | 0.17 % | | 2 | 0.28 % | | 20 | C C D D D C C C | OE100TKW | 1 | 0.17 % | | 1 | 0.14 % | | 21 | C C D D C C C C C C | OL90ITALIA | 1 | 0.17 % | | 1 | 0.14 % | | 22 | C D D C C C | S59ABC | 1 | 0.17 % | | 3 | 0.43 % | | 23 | C C D / C C D C C C | SV5/DL3DRN | 1 | 0.17 % | | 1 | 0.14 % | | 24 | C C D D D C | YR100R | 1 | 0.17 % | | 3 | 0.43 % | |
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