| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BA7IWR | 1267 | 33.86 % | | 1655 | 30.71 % | | 2 | C C D C C | AA0FO | 912 | 24.37 % | | 1257 | 23.32 % | | 3 | C C D C | AA1N | 744 | 19.88 % | | 1252 | 23.23 % | | 4 | C D C C C | F1BAV | 330 | 8.82 % | | 447 | 8.29 % | | 5 | C D C C | D4DX | 167 | 4.46 % | | 243 | 4.51 % | | 6 | C D D C C | A41DL | 51 | 1.36 % | | 73 | 1.35 % | | 7 | D C D C C | 3A2MG | 49 | 1.31 % | | 68 | 1.26 % | | 8 | C D D C | A42K | 40 | 1.07 % | | 62 | 1.15 % | | 9 | D C D C C C | 2D0OMN | 40 | 1.07 % | | 50 | 0.93 % | | 10 | C D C | B1Z | 34 | 0.91 % | | 52 | 0.96 % | | 11 | D C D C | 3G2N | 33 | 0.88 % | | 56 | 1.04 % | | 12 | C D D C C C | E20HHK | 13 | 0.35 % | | 17 | 0.32 % | | 13 | C C D D C | OC73X | 7 | 0.19 % | | 11 | 0.20 % | | 14 | C C D D C C | CQ35MD | 4 | 0.11 % | | 6 | 0.11 % | | 15 | C C D C C C / C | CT7AUE/M | 3 | 0.08 % | | 3 | 0.06 % | | 16 | C D C C C / C | F4IMH/P | 3 | 0.08 % | | 3 | 0.06 % | | 17 | C C D C C C / C C C | DO1CVM/QRP | 3 | 0.08 % | | 4 | 0.07 % | | 18 | C C D D D C C | DM800KM | 3 | 0.08 % | | 3 | 0.06 % | | 19 | C C D C C C / D | JA7MVX/7 | 3 | 0.08 % | | 3 | 0.06 % | | 20 | C C D D D C C C | OL730PLZ | 3 | 0.08 % | | 4 | 0.07 % | | 21 | C C D / C C D C C | CT7/VA3FH | 2 | 0.05 % | | 4 | 0.07 % | | 22 | C C D D C C C | LZ73TRC | 2 | 0.05 % | | 2 | 0.04 % | | 23 | C C D D D D C | DL2025B | 2 | 0.05 % | | 3 | 0.06 % | | 24 | C D C C C / C C C | F1ICR/QRP | 2 | 0.05 % | | 2 | 0.04 % | | 25 | C C D D D C C C C | PA100IARU | 2 | 0.05 % | | 2 | 0.04 % | | 26 | C C / C C D C C C | SM/UA1CBX | 2 | 0.05 % | | 2 | 0.04 % | | 27 | C C D C C / D | RD7LB/3 | 2 | 0.05 % | | 5 | 0.09 % | | 28 | D C / C C D C C C | 9A/VA3LPZ | 1 | 0.03 % | | 2 | 0.04 % | | 29 | D C D D C | 9A73A | 1 | 0.03 % | | 3 | 0.06 % | | 30 | C C D D C C C C C | HG25TISZA | 1 | 0.03 % | | 1 | 0.02 % | | 31 | C C / C C D C C | LA/US1PM | 1 | 0.03 % | | 1 | 0.02 % | | 32 | C D D D C C C | D450ICV | 1 | 0.03 % | | 1 | 0.02 % | | 33 | C D D C C C / C | M30PLX/M | 1 | 0.03 % | | 1 | 0.02 % | | 34 | C C D / C C D C C C | IV3/IU2NKC | 1 | 0.03 % | | 1 | 0.02 % | | 35 | C C D D C C C C | HF30KSRG | 1 | 0.03 % | | 2 | 0.04 % | | 36 | C C D C C C / C C D | ON4BAX/SV9 | 1 | 0.03 % | | 1 | 0.02 % | | 37 | C D C C / D | R8MB/1 | 1 | 0.03 % | | 1 | 0.02 % | | 38 | C D C C / C | R2AT/P | 1 | 0.03 % | | 1 | 0.02 % | | 39 | C C D C C / C | DH9DX/P | 1 | 0.03 % | | 1 | 0.02 % | | 40 | C C D C / C | RV3X/P | 1 | 0.03 % | | 2 | 0.04 % | | 41 | C D D D C | S571C | 1 | 0.03 % | | 2 | 0.04 % | | 42 | C D D D C C | S590AA | 1 | 0.03 % | | 1 | 0.02 % | | 43 | C C D C / C C | RD1A/MM | 1 | 0.03 % | | 1 | 0.02 % | | 44 | C C D / C D C C | TI8/N7ZG | 1 | 0.03 % | | 1 | 0.02 % | | 45 | C C D D D C | YL400L | 1 | 0.03 % | | 5 | 0.09 % | | 46 | C C D C C / C C C | YU1LM/QRP | 1 | 0.03 % | | 1 | 0.02 % | |
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