| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 784 | 35.27 % | | 1308 | 35.85 % | | 2 | C C D C C C | CT1BOH | 553 | 24.88 % | | 799 | 21.90 % | | 3 | C C D C | AA1K | 304 | 13.68 % | | 543 | 14.88 % | | 4 | C D C C | B7HQ | 252 | 11.34 % | | 373 | 10.22 % | | 5 | C D C C C | F1AGR | 117 | 5.26 % | | 184 | 5.04 % | | 6 | C D D C | E72U | 87 | 3.91 % | | 228 | 6.25 % | | 7 | C D D C C | A47RS | 26 | 1.17 % | | 48 | 1.32 % | | 8 | D C D C C | 4M5EN | 21 | 0.94 % | | 37 | 1.01 % | | 9 | C D C | G3P | 13 | 0.58 % | | 31 | 0.85 % | | 10 | D C D C | 3Z0X | 8 | 0.36 % | | 17 | 0.47 % | | 11 | C C / C C D C C | DL/OM2AA | 5 | 0.22 % | | 8 | 0.22 % | | 12 | C C / C C D C | DL/HG0R | 4 | 0.18 % | | 5 | 0.14 % | | 13 | D C D C C C | 2E0JWJ | 4 | 0.18 % | | 4 | 0.11 % | | 14 | C D C C C / C | F4GKR/P | 3 | 0.13 % | | 6 | 0.16 % | | 15 | C C / C D C C C | DL/G4IRN | 3 | 0.13 % | | 4 | 0.11 % | | 16 | C C D C C / C | DB1DH/P | 3 | 0.13 % | | 3 | 0.08 % | | 17 | C C D D D C C C | OE100RAD | 3 | 0.13 % | | 3 | 0.08 % | | 18 | C C / C D C C | DL/W4PA | 2 | 0.09 % | | 5 | 0.14 % | | 19 | C C / C C D C C C | DL/LZ1ABC | 2 | 0.09 % | | 3 | 0.08 % | | 20 | C D C C / D | W1AW/4 | 2 | 0.09 % | | 3 | 0.08 % | | 21 | C C D C C / C C C | YU1LD/QRP | 2 | 0.09 % | | 2 | 0.05 % | | 22 | C C D C C C / C | DL5RMH/P | 2 | 0.09 % | | 3 | 0.08 % | | 23 | C C D D C | OG55W | 2 | 0.09 % | | 8 | 0.22 % | | 24 | C C D D C C C C | LM90NRRL | 2 | 0.09 % | | 2 | 0.05 % | | 25 | C D D C C C | S56WYB | 2 | 0.09 % | | 2 | 0.05 % | | 26 | C C D C C / C C | RA0LQ/MM | 2 | 0.09 % | | 2 | 0.05 % | | 27 | C C D C C / D | NU1AW/9 | 2 | 0.09 % | | 3 | 0.08 % | | 28 | C C D D C C | LM90HQ | 1 | 0.04 % | | 1 | 0.03 % | | 29 | C D / C C D C C | I0/YO3XX | 1 | 0.04 % | | 1 | 0.03 % | | 30 | D C / C D D C C | 9A/S57KM | 1 | 0.04 % | | 2 | 0.05 % | | 31 | D C D D D C | 3Z100K | 1 | 0.04 % | | 1 | 0.03 % | | 32 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 1 | 0.03 % | | 33 | C C D C / C C D | NP4G/KP2 | 1 | 0.04 % | | 1 | 0.03 % | | 34 | C C D C / C C D C C | PY0F/PY7RP | 1 | 0.04 % | | 1 | 0.03 % | | 35 | C D D C C C C | J32FIFA | 1 | 0.04 % | | 1 | 0.03 % | | 36 | C D D C C / C C | S51TM/MM | 1 | 0.04 % | | 1 | 0.03 % | | 37 | C C D D C C C | OH73ELK | 1 | 0.04 % | | 2 | 0.05 % | | 38 | C C D C C C / C C | SP5LJP/MM | 1 | 0.04 % | | 1 | 0.03 % | | 39 | C C D C C C / C C C | EA7AAW/QRP | 1 | 0.04 % | | 1 | 0.03 % | | 40 | C / C C D C C | F/DF5RF | 1 | 0.04 % | | 1 | 0.03 % | |
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