| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C | AA4AK | 868 | 34.92 % | | 1514 | 36.30 % | | 2 | C C D C C C | CT1BOH | 615 | 24.74 % | | 881 | 21.12 % | | 3 | C C D C | AA1K | 345 | 13.88 % | | 617 | 14.79 % | | 4 | C D C C | B7HQ | 275 | 11.06 % | | 411 | 9.85 % | | 5 | C D C C C | F1IWH | 134 | 5.39 % | | 191 | 4.58 % | | 6 | C D D C | E72U | 92 | 3.70 % | | 309 | 7.41 % | | 7 | C D D C C | A47RS | 29 | 1.17 % | | 47 | 1.13 % | | 8 | D C D C C | 4O1HQ | 25 | 1.01 % | | 45 | 1.08 % | | 9 | D C D C | 3Z0X | 15 | 0.60 % | | 19 | 0.46 % | | 10 | C D C | G3P | 14 | 0.56 % | | 34 | 0.82 % | | 11 | C C D C C / C | DF3YG/P | 7 | 0.28 % | | 7 | 0.17 % | | 12 | C C D D D C C C | OE100RAD | 5 | 0.20 % | | 8 | 0.19 % | | 13 | C C / C C D C C | DL/EA7KW | 5 | 0.20 % | | 6 | 0.14 % | | 14 | D C D C C C | 2E0CVN | 4 | 0.16 % | | 4 | 0.10 % | | 15 | C C / C C D C C C | DL/HB9DQL | 4 | 0.16 % | | 8 | 0.19 % | | 16 | C C / C D C C | DL/K5NA | 4 | 0.16 % | | 9 | 0.22 % | | 17 | C C / C C D C | DL/HG0R | 4 | 0.16 % | | 5 | 0.12 % | | 18 | C C D C C C / C | DG4TAR/P | 4 | 0.16 % | | 5 | 0.12 % | | 19 | C C / C D C C C | DL/I4UFH | 3 | 0.12 % | | 4 | 0.10 % | | 20 | C C D C C / D | NU1AW/9 | 3 | 0.12 % | | 5 | 0.12 % | | 21 | C D C C / D | R8MB/1 | 2 | 0.08 % | | 2 | 0.05 % | | 22 | C C D D C C C | DB25ONN | 2 | 0.08 % | | 2 | 0.05 % | | 23 | C C D C C C / C C | DG7LAN/MM | 2 | 0.08 % | | 2 | 0.05 % | | 24 | C C D D C | OG55W | 2 | 0.08 % | | 7 | 0.17 % | | 25 | C C D C C / C C | RA0LQ/MM | 2 | 0.08 % | | 2 | 0.05 % | | 26 | C D C C C / C | F4GKR/P | 2 | 0.08 % | | 3 | 0.07 % | | 27 | C C D D D C | OG555W | 2 | 0.08 % | | 2 | 0.05 % | | 28 | D C / C D D C C | 9A/S56KM | 2 | 0.08 % | | 4 | 0.10 % | | 29 | D C / C C D C | 4L/RC5A | 1 | 0.04 % | | 2 | 0.05 % | | 30 | C C D D C C C C | LM90NRRL | 1 | 0.04 % | | 1 | 0.02 % | | 31 | D C D C C / C | 9A6DR/P | 1 | 0.04 % | | 1 | 0.02 % | | 32 | C C D D D C C | DL100BY | 1 | 0.04 % | | 1 | 0.02 % | | 33 | C C D C C C C | DA0WRTC | 1 | 0.04 % | | 1 | 0.02 % | | 34 | C / C C D C C | F/DF5RF | 1 | 0.04 % | | 1 | 0.02 % | | 35 | C D D C C / C C | S51TA/MM | 1 | 0.04 % | | 1 | 0.02 % | | 36 | C D D C C C | S57NML | 1 | 0.04 % | | 1 | 0.02 % | | 37 | C C D C / D | SB5N/7 | 1 | 0.04 % | | 1 | 0.02 % | | 38 | C C / C C D C C / C | SM/DO7EN/P | 1 | 0.04 % | | 1 | 0.02 % | | 39 | C C D / C C D C C | SV2/RW3AL | 1 | 0.04 % | | 2 | 0.05 % | | 40 | C C D / C C D C C C | SV8/HB9FIH | 1 | 0.04 % | | 1 | 0.02 % | | 41 | C C D / C D D C C | SV9/S55OO | 1 | 0.04 % | | 1 | 0.02 % | | 42 | C C D C C / C C C | YU1LM/QRP | 1 | 0.04 % | | 2 | 0.05 % | | 43 | C D D C / C | Z35M/P | 1 | 0.04 % | | 1 | 0.02 % | |
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