| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | AP5ARS | 1431 | 29.79 % | | 2167 | 24.93 % | | 2 | C C D C C | AB1XQ | 1289 | 26.84 % | | 2413 | 27.76 % | | 3 | C C D C | AB1F | 669 | 13.93 % | | 1495 | 17.20 % | | 4 | C D C C C | D6MDG | 537 | 11.18 % | | 729 | 8.39 % | | 5 | C D C C | A1WJ | 499 | 10.39 % | | 840 | 9.67 % | | 6 | C D D C | E70A | 98 | 2.04 % | | 415 | 4.78 % | | 7 | C D D C C | A47HQ | 53 | 1.10 % | | 123 | 1.42 % | | 8 | D C D C C | 3A2MG | 42 | 0.87 % | | 94 | 1.08 % | | 9 | D C D C C C | 2E0CVN | 28 | 0.58 % | | 38 | 0.44 % | | 10 | C D C | C4W | 25 | 0.52 % | | 63 | 0.72 % | | 11 | D C D C | 3G3O | 21 | 0.44 % | | 36 | 0.41 % | | 12 | C C D C C C / C | DG0ONU/P | 15 | 0.31 % | | 17 | 0.20 % | | 13 | C C D D C C C | DK70BAD | 14 | 0.29 % | | 24 | 0.28 % | | 14 | C D C C C / C | F4GYG/P | 11 | 0.23 % | | 14 | 0.16 % | | 15 | C D D C C C | E20XMG | 7 | 0.15 % | | 8 | 0.09 % | | 16 | C C D C C / C | DF0PW/P | 6 | 0.12 % | | 7 | 0.08 % | | 17 | C C D / C C D C C | EA7/VE3NZ | 4 | 0.08 % | | 6 | 0.07 % | | 18 | C C D C / C | OU7M/P | 4 | 0.08 % | | 5 | 0.06 % | | 19 | C C D D C | IU49D | 4 | 0.08 % | | 9 | 0.10 % | | 20 | C D / C C D C C | I4/DJ5AN | 3 | 0.06 % | | 4 | 0.05 % | | 21 | C C D C C / C C C | DD1MR/QRP | 3 | 0.06 % | | 4 | 0.05 % | | 22 | C C D C C C / D | OE1UVA/3 | 2 | 0.04 % | | 2 | 0.02 % | | 23 | C C / C C D C | FP/KV1J | 2 | 0.04 % | | 2 | 0.02 % | | 24 | C C / C C D C C | ER/UT1ZZ | 2 | 0.04 % | | 2 | 0.02 % | | 25 | C C D C C C / C C C | EA5BIN/QRP | 2 | 0.04 % | | 2 | 0.02 % | | 26 | C C D C C / C D | KH2AR/W4 | 2 | 0.04 % | | 2 | 0.02 % | | 27 | D C / C D D C | 9A/S51Z | 2 | 0.04 % | | 3 | 0.03 % | | 28 | C D / C D D C | E7/Z35M | 1 | 0.02 % | | 3 | 0.03 % | | 29 | D C D C D D C | 9A7S58Y | 1 | 0.02 % | | 1 | 0.01 % | | 30 | D C C C C | 9ACVG | 1 | 0.02 % | | 1 | 0.01 % | | 31 | C C D / C C D C C C | CT7/DH8BQA | 1 | 0.02 % | | 1 | 0.01 % | | 32 | D C D D C C | 8S80AA | 1 | 0.02 % | | 2 | 0.02 % | | 33 | D C / C D D C C | 9A/S57KM | 1 | 0.02 % | | 3 | 0.03 % | | 34 | C C D / C D C C | HB0/R5GA | 1 | 0.02 % | | 3 | 0.03 % | | 35 | D C C C C C | 2EOWHQ | 1 | 0.02 % | | 1 | 0.01 % | | 36 | D C D D D C C C | 9A150TEC | 1 | 0.02 % | | 1 | 0.01 % | | 37 | C D / C C D C C C | I4/PA0GJV | 1 | 0.02 % | | 3 | 0.03 % | | 38 | C C D D | II44 | 1 | 0.02 % | | 1 | 0.01 % | | 39 | C C D / C C D C | EA5/RV2A | 1 | 0.02 % | | 1 | 0.01 % | | 40 | C D C C / D | K2NV/2 | 1 | 0.02 % | | 2 | 0.02 % | | 41 | C C D D C C C C C | HG23TISZA | 1 | 0.02 % | | 1 | 0.01 % | | 42 | C C D C / C C D | KH7M/KH6 | 1 | 0.02 % | | 1 | 0.01 % | | 43 | C C D D D D C C | LY1933DG | 1 | 0.02 % | | 1 | 0.01 % | | 44 | C C D D C C | ER77HQ | 1 | 0.02 % | | 1 | 0.01 % | | 45 | C C D C C / C C | ON7GY/MM | 1 | 0.02 % | | 1 | 0.01 % | | 46 | D C / C C D C C C | 9A/DL6FAH | 1 | 0.02 % | | 1 | 0.01 % | | 47 | C C / C C D C C C | PA/HB9CEY | 1 | 0.02 % | | 1 | 0.01 % | | 48 | C C D C / C C | RD1A/MM | 1 | 0.02 % | | 2 | 0.02 % | | 49 | C D / C D C C C | S5/M0MPM | 1 | 0.02 % | | 1 | 0.01 % | | 50 | C C / C C D C C C / C | SM/DL6NEP/P | 1 | 0.02 % | | 1 | 0.01 % | | 51 | C C D D D C C C C | SN300CITY | 1 | 0.02 % | | 1 | 0.01 % | | 52 | C C D D D C C C | TC100ATA | 1 | 0.02 % | | 1 | 0.01 % | | 53 | C C / D C D C C | TF/4X6TT | 1 | 0.02 % | | 1 | 0.01 % | | 54 | C D C C / C C D | W1AW/KH6 | 1 | 0.02 % | | 2 | 0.02 % | | 55 | C D C C C / C C D | W1MTI/HB0 | 1 | 0.02 % | | 1 | 0.01 % | |
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