| Callsign structure | # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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| 1 | C C D C C | DF1DX | 64 | 32.16 % | | 72 | 31.44 % | | | 2 | C C D C C C | DL4JYT | 42 | 21.11 % | | 47 | 20.52 % | | | 3 | C C D C | CR6K | 34 | 17.09 % | | 39 | 17.03 % | | | 4 | D C D C | 4J9M | 13 | 6.53 % | | 19 | 8.30 % | | | 5 | D C D C C | 6Y5WJ | 13 | 6.53 % | | 14 | 6.11 % | | | 6 | C D C C | K9WA | 11 | 5.53 % | | 13 | 5.68 % | | | 7 | C D D C | S53M | 6 | 3.02 % | | 7 | 3.06 % | | | 8 | C D C C C | F6EAZ | 5 | 2.51 % | | 6 | 2.62 % | | | 9 | D C D C C C | 9A1CKG | 3 | 1.51 % | | 4 | 1.75 % | | | 10 | C D D C C | E77DX | 3 | 1.51 % | | 3 | 1.31 % | | | 11 | C C D D C | EM20V | 1 | 0.50 % | | 1 | 0.44 % | | | 12 | D C D D C | 9A50Z | 1 | 0.50 % | | 1 | 0.44 % | | | 13 | C C D D C C C | OM50CDN | 1 | 0.50 % | | 1 | 0.44 % | | | 14 | C C D C C C / D | RW6HJV/6 | 1 | 0.50 % | | 1 | 0.44 % | | | 15 | C D D C C C | E74EBL | 1 | 0.50 % | | 1 | 0.44 % | |
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