| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4LS | 191 | 28.98 % | | 251 | 29.49 % | | 2 | C C D C | AA3B | 181 | 27.47 % | | 241 | 28.32 % | | 3 | C C D C C C | CM8NMN | 132 | 20.03 % | | 152 | 17.86 % | | 4 | C D C C | E7CW | 65 | 9.86 % | | 83 | 9.75 % | | 5 | C D C C C | F5ICC | 27 | 4.10 % | | 34 | 4.00 % | | 6 | C D D C | J42L | 15 | 2.28 % | | 19 | 2.23 % | | 7 | C D D C C | E71CQ | 11 | 1.67 % | | 15 | 1.76 % | | 8 | D C D C | 4L8A | 9 | 1.37 % | | 13 | 1.53 % | | 9 | C D C | G2F | 8 | 1.21 % | | 12 | 1.41 % | | 10 | D C D C C | 3B8XF | 6 | 0.91 % | | 8 | 0.94 % | | 11 | C C D / C C D C C C | CT9/DL3KWF | 3 | 0.46 % | | 3 | 0.35 % | | 12 | C C D / C C D C C | HI3/KC1XX | 2 | 0.30 % | | 4 | 0.47 % | | 13 | C C D C C C C C | DF0FYOTA | 1 | 0.15 % | | 1 | 0.12 % | | 14 | D C D D C | 4U73B | 1 | 0.15 % | | 2 | 0.24 % | | 15 | C C D / C C D C | IS0/OM8A | 1 | 0.15 % | | 5 | 0.59 % | | 16 | D C / C C D C C | 5B/RN3QO | 1 | 0.15 % | | 2 | 0.24 % | | 17 | C D C C / D | K2ZR/4 | 1 | 0.15 % | | 2 | 0.24 % | | 18 | C C D D C C C | LZ60KAA | 1 | 0.15 % | | 1 | 0.12 % | | 19 | C D D C C C | S59ABC | 1 | 0.15 % | | 1 | 0.12 % | | 20 | C C D D D C | SN100L | 1 | 0.15 % | | 1 | 0.12 % | | 21 | C C D C C C / D | WA1PGB/6 | 1 | 0.15 % | | 1 | 0.12 % | |
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