| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA3TT | 140 | 31.04 % | | 257 | 38.88 % | | 2 | C C D C | AA1K | 98 | 21.73 % | | 128 | 19.36 % | | 3 | C D C C | B4HQ | 97 | 21.51 % | | 124 | 18.76 % | | 4 | C C D C C C | CT1DRB | 59 | 13.08 % | | 70 | 10.59 % | | 5 | C D C C C | F5PCV | 24 | 5.32 % | | 25 | 3.78 % | | 6 | C D C | D4Z | 8 | 1.77 % | | 10 | 1.51 % | | 7 | D C D C C | 4X1MM | 7 | 1.55 % | | 15 | 2.27 % | | 8 | C D D C C | A60HQ | 5 | 1.11 % | | 16 | 2.42 % | | 9 | D C D C C C | 2E0INN | 2 | 0.44 % | | 2 | 0.30 % | | 10 | C D D C | P44W | 2 | 0.44 % | | 2 | 0.30 % | | 11 | D C D C | 4O4T | 2 | 0.44 % | | 2 | 0.30 % | | 12 | C C D C C / D | NU1AW/5 | 2 | 0.44 % | | 2 | 0.30 % | | 13 | D C / C C D C | 4O/KL2A | 1 | 0.22 % | | 1 | 0.15 % | | 14 | C C D D C C | BV30HQ | 1 | 0.22 % | | 1 | 0.15 % | | 15 | D C / C D C C | 9A/K7GM | 1 | 0.22 % | | 1 | 0.15 % | | 16 | C D D C C C | L21RCA | 1 | 0.22 % | | 4 | 0.61 % | | 17 | C D C C / C C D | W1AW/KL7 | 1 | 0.22 % | | 1 | 0.15 % | |
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