| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA1ON | 746 | 34.75 % | | 1369 | 36.25 % | | 2 | C C D C C C | CT1BOH | 492 | 22.92 % | | 713 | 18.88 % | | 3 | C C D C | AA1K | 304 | 14.16 % | | 589 | 15.59 % | | 4 | C D C C | A6AF | 251 | 11.69 % | | 408 | 10.80 % | | 5 | C D C C C | F1PYN | 119 | 5.54 % | | 172 | 4.55 % | | 6 | C D D C | E70A | 90 | 4.19 % | | 281 | 7.44 % | | 7 | C D D C C | A47RS | 29 | 1.35 % | | 54 | 1.43 % | | 8 | D C D C C | 4O1HQ | 27 | 1.26 % | | 49 | 1.30 % | | 9 | C D C | C4W | 17 | 0.79 % | | 30 | 0.79 % | | 10 | D C D C | 3Z0X | 11 | 0.51 % | | 18 | 0.48 % | | 11 | D C D C C C | 2E0AOZ | 7 | 0.33 % | | 9 | 0.24 % | | 12 | C C / C C D C C | DL/EA7KW | 6 | 0.28 % | | 9 | 0.24 % | | 13 | C C / C D C C | DL/K5NA | 4 | 0.19 % | | 10 | 0.26 % | | 14 | C C D C C C / C | DL2KUH/P | 4 | 0.19 % | | 7 | 0.19 % | | 15 | C C / C C D C C C | DL/HB9DQL | 3 | 0.14 % | | 5 | 0.13 % | | 16 | C C D C / D | NU1W/9 | 3 | 0.14 % | | 3 | 0.08 % | | 17 | C C D C C / C | DK2RZ/M | 3 | 0.14 % | | 3 | 0.08 % | | 18 | C C / C C D C | DL/HG0R | 3 | 0.14 % | | 7 | 0.19 % | | 19 | C D C C / D | R8MB/1 | 2 | 0.09 % | | 4 | 0.11 % | | 20 | C C D D D C C C | OE100RAD | 2 | 0.09 % | | 4 | 0.11 % | | 21 | C C / C D C C C | DL/G4IRN | 2 | 0.09 % | | 2 | 0.05 % | | 22 | C D C C C / C | F4GKR/P | 2 | 0.09 % | | 5 | 0.13 % | | 23 | C C D D C | OG55W | 2 | 0.09 % | | 3 | 0.08 % | | 24 | C D C C / C | G4WG/P | 1 | 0.05 % | | 1 | 0.03 % | | 25 | D C / C C D C | 4L/RC5A | 1 | 0.05 % | | 2 | 0.05 % | | 26 | C C D C C C / C C D | IK2AIT/IV3 | 1 | 0.05 % | | 1 | 0.03 % | | 27 | D C / C D D C C | 9A/S57KM | 1 | 0.05 % | | 2 | 0.05 % | | 28 | C C D D C C C C | LM90NRRL | 1 | 0.05 % | | 2 | 0.05 % | | 29 | C C D C C / D | NU1AW/9 | 1 | 0.05 % | | 2 | 0.05 % | | 30 | C / C D C C C / C | I/G4BJM/M | 1 | 0.05 % | | 1 | 0.03 % | | 31 | C / C C D C C | F/DF5RF | 1 | 0.05 % | | 1 | 0.03 % | | 32 | C D C C D | K8MF0 | 1 | 0.05 % | | 1 | 0.03 % | | 33 | D C D D D C | 3Z100K | 1 | 0.05 % | | 1 | 0.03 % | | 34 | C D D C C / C C | S51TA/MM | 1 | 0.05 % | | 2 | 0.05 % | | 35 | C D D C C C | S57NML | 1 | 0.05 % | | 1 | 0.03 % | | 36 | C C D C C C / C C | SP5LJP/MM | 1 | 0.05 % | | 1 | 0.03 % | | 37 | C C D / C C D C C | SV2/RW3AL | 1 | 0.05 % | | 1 | 0.03 % | | 38 | C C D / C D D C C | SV9/S55OO | 1 | 0.05 % | | 1 | 0.03 % | | 39 | C C D C C / C C | YL3IZ/MM | 1 | 0.05 % | | 1 | 0.03 % | | 40 | C C D C C / C C C | YU1LM/QRP | 1 | 0.05 % | | 1 | 0.03 % | | 41 | C D D C / C C C | Z35M/QRP | 1 | 0.05 % | | 1 | 0.03 % | |
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