| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA2ZW | 868 | 26.46 % | | 1338 | 25.90 % | | 2 | C C D C | AA1O | 825 | 25.14 % | | 1495 | 28.94 % | | 3 | C C D C C C | BD1IIJ | 704 | 21.46 % | | 1013 | 19.61 % | | 4 | C D C C | E7CW | 381 | 11.61 % | | 585 | 11.32 % | | 5 | C D C C C | F1AKK | 270 | 8.23 % | | 379 | 7.34 % | | 6 | C D D C | E70T | 46 | 1.40 % | | 72 | 1.39 % | | 7 | C D C | C4W | 40 | 1.22 % | | 65 | 1.26 % | | 8 | D C D C C | 3V8SS | 25 | 0.76 % | | 43 | 0.83 % | | 9 | C D D C C | A41CK | 25 | 0.76 % | | 33 | 0.64 % | | 10 | D C D C | 3E3E | 23 | 0.70 % | | 35 | 0.68 % | | 11 | D C D C C C | 2E0CVN | 12 | 0.37 % | | 17 | 0.33 % | | 12 | C C D D C | EI20C | 10 | 0.30 % | | 20 | 0.39 % | | 13 | C C D D C C C | DL50IFM | 10 | 0.30 % | | 14 | 0.27 % | | 14 | C C D D C C C C | HF90TPCF | 5 | 0.15 % | | 6 | 0.12 % | | 15 | C C D D C C | OG30YL | 5 | 0.15 % | | 7 | 0.14 % | | 16 | C C D D D C C | OL901AA | 3 | 0.09 % | | 4 | 0.08 % | | 17 | C D D C C C | E24NQN | 3 | 0.09 % | | 3 | 0.06 % | | 18 | C C D C C C / C | DL7ARV/P | 2 | 0.06 % | | 2 | 0.04 % | | 19 | C C D D D C C C | DL100BKW | 2 | 0.06 % | | 2 | 0.04 % | | 20 | C C D C C C / D | RA4LBS/3 | 2 | 0.06 % | | 3 | 0.06 % | | 21 | C C D C C C / C C C | IK2MXM/QRP | 2 | 0.06 % | | 4 | 0.08 % | | 22 | C D C C / D | R8MB/1 | 2 | 0.06 % | | 2 | 0.04 % | | 23 | C C / C D C C | EW/R3XA | 1 | 0.03 % | | 1 | 0.02 % | | 24 | D C D C C C C C C C C | 4U9STAYHOME | 1 | 0.03 % | | 1 | 0.02 % | | 25 | C C D C C / C | DF7BA/P | 1 | 0.03 % | | 1 | 0.02 % | | 26 | C C D D D C | LY175Z | 1 | 0.03 % | | 2 | 0.04 % | | 27 | C C D / C D C C | CT7/K9PM | 1 | 0.03 % | | 1 | 0.02 % | | 28 | C C D C C C C C C C C | OH5STAYHOME | 1 | 0.03 % | | 1 | 0.02 % | | 29 | C C D / C C D C | EA5/RV2A | 1 | 0.03 % | | 2 | 0.04 % | | 30 | C C D C / C | OT5N/P | 1 | 0.03 % | | 2 | 0.04 % | | 31 | C C D / C D C C C | PJ4/K4BAI | 1 | 0.03 % | | 1 | 0.02 % | | 32 | D C D / C D C C | 5Z4/G3AB | 1 | 0.03 % | | 1 | 0.02 % | | 33 | D C D C C C / D | 7K1MAG/2 | 1 | 0.03 % | | 2 | 0.04 % | | 34 | C D D D D C | S5400J | 1 | 0.03 % | | 1 | 0.02 % | | 35 | C C D C C C / C C | UW5EJX/MM | 1 | 0.03 % | | 3 | 0.06 % | | 36 | C C D C C / C C C | YU1LM/QRP | 1 | 0.03 % | | 1 | 0.02 % | | 37 | C C D / C C D C C C | ZP6/LU8EOT | 1 | 0.03 % | | 1 | 0.02 % | | 38 | C C D C / D | ZR2A/4 | 1 | 0.03 % | | 3 | 0.06 % | |
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