| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 647 | 34.80 % | | 1097 | 35.55 % | | 2 | C C D C C C | CT1BOH | 397 | 21.36 % | | 582 | 18.86 % | | 3 | C C D C | AA1K | 274 | 14.74 % | | 501 | 16.23 % | | 4 | C D C C | E7CW | 220 | 11.83 % | | 327 | 10.60 % | | 5 | C D C C C | F4EFI | 118 | 6.35 % | | 163 | 5.28 % | | 6 | C D D C | E70A | 84 | 4.52 % | | 218 | 7.06 % | | 7 | D C D C C | 3V8CB | 24 | 1.29 % | | 41 | 1.33 % | | 8 | C D D C C | A47RS | 22 | 1.18 % | | 40 | 1.30 % | | 9 | D C D C | 3Z0X | 12 | 0.65 % | | 19 | 0.62 % | | 10 | C D C | G3P | 11 | 0.59 % | | 28 | 0.91 % | | 11 | C C / C C D C C | DL/OZ1AA | 5 | 0.27 % | | 7 | 0.23 % | | 12 | C C D C C / C | DJ4MM/P | 4 | 0.22 % | | 5 | 0.16 % | | 13 | C C / C D C C | DL/K9NW | 4 | 0.22 % | | 9 | 0.29 % | | 14 | D C D C C C | 2E0CVN | 4 | 0.22 % | | 4 | 0.13 % | | 15 | C C / C C D C | DL/HG0R | 4 | 0.22 % | | 7 | 0.23 % | | 16 | C C D C C C / C | DL2KUS/P | 2 | 0.11 % | | 3 | 0.10 % | | 17 | C C D C C / C C | RA0LQ/MM | 2 | 0.11 % | | 2 | 0.06 % | | 18 | C D C C C / C | F4GKR/P | 2 | 0.11 % | | 4 | 0.13 % | | 19 | C C / C C D C C C | DL/HB9DQL | 2 | 0.11 % | | 3 | 0.10 % | | 20 | C C D C C / D | NU1AW/9 | 2 | 0.11 % | | 3 | 0.10 % | | 21 | D C / C D D C C | 9A/S57KM | 1 | 0.05 % | | 2 | 0.06 % | | 22 | D C / C C D C | 4L/RC5A | 1 | 0.05 % | | 2 | 0.06 % | | 23 | C C D / C C D C C | EA6/DK5ON | 1 | 0.05 % | | 1 | 0.03 % | | 24 | C C D C C C / C C D | IK2AIT/IA3 | 1 | 0.05 % | | 1 | 0.03 % | | 25 | C C D C C / C D | KH6ND/W7 | 1 | 0.05 % | | 1 | 0.03 % | | 26 | C C D D C C | LM90HQ | 1 | 0.05 % | | 1 | 0.03 % | | 27 | D C D D D C | 3Z100K | 1 | 0.05 % | | 1 | 0.03 % | | 28 | C C D C / C C D | NP4G/KP2 | 1 | 0.05 % | | 1 | 0.03 % | | 29 | C / C C D C C | F/DF5RF | 1 | 0.05 % | | 1 | 0.03 % | | 30 | C C D D D C C C | OE100SPW | 1 | 0.05 % | | 1 | 0.03 % | | 31 | C C D D C C C C | LM90NRRL | 1 | 0.05 % | | 1 | 0.03 % | | 32 | C D D C C / C C | S51TA/MM | 1 | 0.05 % | | 1 | 0.03 % | | 33 | C D D C C C | S57NML | 1 | 0.05 % | | 1 | 0.03 % | | 34 | C C D C / D | SB5N/7 | 1 | 0.05 % | | 1 | 0.03 % | | 35 | C D C C / D | W1AW/4 | 1 | 0.05 % | | 1 | 0.03 % | | 36 | C C D D D C | YR100R | 1 | 0.05 % | | 1 | 0.03 % | | 37 | C C D D C | YR33A | 1 | 0.05 % | | 1 | 0.03 % | | 38 | C C D C C / C C C | YU1LM/QRP | 1 | 0.05 % | | 3 | 0.10 % | | 39 | C D D C / C C C | Z35M/QRP | 1 | 0.05 % | | 1 | 0.03 % | |
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