| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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| 1 | C C D C | AA3B | 80 | 36.87 % | | 114 | 39.31 % | | | 2 | C D C C | K0AP | 43 | 19.82 % | | 59 | 20.34 % | | | 3 | C C D C C | AA2MF | 31 | 14.29 % | | 38 | 13.10 % | | | 4 | C C D C C C | CT7BJG | 28 | 12.90 % | | 31 | 10.69 % | | | 5 | C D C C C | F4FFZ | 21 | 9.68 % | | 28 | 9.66 % | | | 6 | C D D C | C37N | 7 | 3.23 % | | 10 | 3.45 % | | | 7 | D C D C | 5Q2R | 3 | 1.38 % | | 5 | 1.72 % | | | 8 | C D C | G8X | 2 | 0.92 % | | 3 | 1.03 % | | | 9 | C C D D C | OZ11A | 1 | 0.46 % | | 1 | 0.34 % | | | 10 | C D C C / D | W1AW/1 | 1 | 0.46 % | | 1 | 0.34 % | |
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