| Callsign structure # | Callsign structure, C - char, D - digit | Example | Callsigns | % | QSOs | % |
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1 | C C D C C C | BD4TUC | 1510 | 30.90 % | | 2555 | 26.36 % | | 2 | C C D C C | AB1EP | 1446 | 29.59 % | | 3148 | 32.47 % | | 3 | C C D C | AB2E | 676 | 13.83 % | | 1818 | 18.75 % | | 4 | C D C C C | E2ZEK | 546 | 11.17 % | | 807 | 8.32 % | | 5 | C D C C | B3HQ | 449 | 9.19 % | | 820 | 8.46 % | | 6 | D C D C C | 2E0CD | 41 | 0.84 % | | 103 | 1.06 % | | 7 | C D D C C | A41JZ | 32 | 0.65 % | | 97 | 1.00 % | | 8 | D C D C C C | 2D0PEI | 28 | 0.57 % | | 39 | 0.40 % | | 9 | C D D C | A42K | 27 | 0.55 % | | 71 | 0.73 % | | 10 | C D C | C4W | 25 | 0.51 % | | 66 | 0.68 % | | 11 | D C D C | 3Z1K | 15 | 0.31 % | | 39 | 0.40 % | | 12 | C C D C C C / C | DG1KNT/M | 13 | 0.27 % | | 19 | 0.20 % | | 13 | C C D D C C C | DF70DRC | 11 | 0.23 % | | 15 | 0.15 % | | 14 | C D C C C / C | F1RFK/P | 9 | 0.18 % | | 9 | 0.09 % | | 15 | C C D C C / C | DJ6TB/P | 6 | 0.12 % | | 6 | 0.06 % | | 16 | C C D C C C / D | ES1NOA/2 | 4 | 0.08 % | | 4 | 0.04 % | | 17 | C C D C C C / C C C | HA5BGG/QRP | 3 | 0.06 % | | 3 | 0.03 % | | 18 | C C D C C C C | II4WRTC | 3 | 0.06 % | | 3 | 0.03 % | | 19 | C D D C C C | E21YDP | 3 | 0.06 % | | 7 | 0.07 % | | 20 | C C / C C D C C C / C | DL/OE7AJT/P | 2 | 0.04 % | | 2 | 0.02 % | | 21 | C C / C C D C C | OZ/DL3DW | 2 | 0.04 % | | 2 | 0.02 % | | 22 | C / C C D C C | F/DK1AF | 2 | 0.04 % | | 2 | 0.02 % | | 23 | C C D C C / C C | OZ4UZ/MM | 2 | 0.04 % | | 2 | 0.02 % | | 24 | C D C C / D | W1AW/4 | 2 | 0.04 % | | 5 | 0.05 % | | 25 | C C D D C C | LZ77VP | 2 | 0.04 % | | 6 | 0.06 % | | 26 | C C D / C C D C | EA5/RV2A | 1 | 0.02 % | | 1 | 0.01 % | | 27 | D C / C C D C | 9A/AI6V | 1 | 0.02 % | | 1 | 0.01 % | | 28 | D C D D C C C | 9A40CKG | 1 | 0.02 % | | 1 | 0.01 % | | 29 | C C D / C C D C C | EA8/EA4BQ | 1 | 0.02 % | | 3 | 0.03 % | | 30 | D C D / C D C C | 5Z4/G3AB | 1 | 0.02 % | | 1 | 0.01 % | | 31 | C D C C C C | F5JFUP | 1 | 0.02 % | | 1 | 0.01 % | | 32 | D C / C D D C C | 9A/S57KM | 1 | 0.02 % | | 1 | 0.01 % | | 33 | D C / C D D C C / C C C | 9A/S57KM/QRP | 1 | 0.02 % | | 2 | 0.02 % | | 34 | D C D D D C | 9A164T | 1 | 0.02 % | | 3 | 0.03 % | | 35 | C D C C C / C C | I5WHC/MM | 1 | 0.02 % | | 1 | 0.01 % | | 36 | C D / C D D C | E7/Z35M | 1 | 0.02 % | | 3 | 0.03 % | | 37 | C C D C / C D | KH0G/W2 | 1 | 0.02 % | | 1 | 0.01 % | | 38 | C C D / C D C C C | KP4/K6DTT | 1 | 0.02 % | | 1 | 0.01 % | | 39 | C C D / C D C C | KP4/K7GM | 1 | 0.02 % | | 1 | 0.01 % | | 40 | C C C D C | LYQ3N | 1 | 0.02 % | | 1 | 0.01 % | | 41 | C C / C C D C / C | LZ/OP4L/P | 1 | 0.02 % | | 1 | 0.01 % | | 42 | C / C C D C C C / C | F/HB9AOF/P | 1 | 0.02 % | | 1 | 0.01 % | | 43 | C C D D C | OG55W | 1 | 0.02 % | | 2 | 0.02 % | | 44 | C C D C / C | OP4A/P | 1 | 0.02 % | | 3 | 0.03 % | | 45 | C D C C C C / C | F5RJKP/P | 1 | 0.02 % | | 1 | 0.01 % | | 46 | C D C C / C | G2NV/M | 1 | 0.02 % | | 1 | 0.01 % | | 47 | C C / C D C C C | PA/F1GFK | 1 | 0.02 % | | 1 | 0.01 % | | 48 | C D / C D C C C | S5/M0MPM | 1 | 0.02 % | | 5 | 0.05 % | | 49 | C C D C / C C | SP1R/MM | 1 | 0.02 % | | 1 | 0.01 % | | 50 | C D / C D D C / C | E7/Z35M/P | 1 | 0.02 % | | 1 | 0.01 % | | 51 | C D / C C D C C | W2/EU6KI | 1 | 0.02 % | | 1 | 0.01 % | | 52 | C C D C C / C C C | YU1LM/QRP | 1 | 0.02 % | | 4 | 0.04 % | | 53 | C C D C / D | ZR2A/4 | 1 | 0.02 % | | 2 | 0.02 % | |
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