District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AD4CU | 10 | 53 | 2003-04-20 | 2005-04-21 | Available |
| AD4CV | 9 | 55 | 2033-07-25 | — | Active |
| AD4CW | 9 | 55 | 2028-01-17 | — | Active (Vanity) |
| AD4CX | 9 | 57 | — | — | Available |
| AD4CY | 9 | 59 | 2013-04-20 | 2015-04-21 | Available |
| AD4CZ | 9 | 57 | — | — | Available |
| AD4DA | 9 | 47 | 2023-04-20 | 2025-04-21 | Available |
| AD4DB | 9 | 51 | 2033-05-02 | — | Active |
| AD4DC | 9 | 53 | 2033-04-27 | — | Active |
| AD4DD | 9 | 49 | 2033-04-27 | — | Active |
| AD4DE | 9 | 43 | 2034-03-02 | — | Active |
| AD4DF | 9 | 51 | — | — | Available |
| AD4DG | 8 | 51 | 2035-08-21 | — | Active (Vanity) |
| AD4DH | 9 | 49 | 2015-02-16 | 2017-02-17 | Available |
| AD4DI | 10 | 45 | 2002-10-22 | 2004-10-23 | Available |
| AD4DJ | 10 | 55 | 2033-05-04 | — | Active |
| AD4DK | 9 | 51 | 2023-05-04 | 2025-05-05 | Available |
| AD4DL | 9 | 51 | 2000-10-31 | 2002-11-01 | Available |
| AD4DM | 8 | 49 | 2031-03-19 | — | Active (Vanity) |
| AD4DN | 10 | 47 | 2033-05-13 | — | Active |
| AD4DO | 9 | 53 | 2033-06-12 | — | Active |
| AD4DP | 9 | 53 | 2033-05-04 | — | Active |
| AD4DQ | 9 | 55 | 2031-03-08 | — | Active (Vanity) |
| AD4DR | 10 | 49 | 2033-05-11 | — | Active |
| AD4DS | 10 | 47 | 2036-10-03 | — | Active (Vanity) |
| AD4DT | 9 | 45 | 2023-05-11 | 2025-05-12 | Available |
| AD4DU | 10 | 49 | 2003-05-11 | 2005-05-12 | Available |
| AD4DV | 9 | 51 | 2034-01-11 | — | Active |
| AD4DW | 9 | 51 | 2028-05-05 | — | Active (Vanity) |
| AD4DX | 9 | 53 | 2033-06-23 | — | Active |
| AD4DY | 9 | 55 | 2003-05-11 | 2005-05-12 | Available |
| AD4DZ | 9 | 53 | 2025-04-18 | — | Active (Vanity) |
| AD4EA | 9 | 41 | — | — | Available |
| AD4EB | 9 | 45 | 2033-05-18 | — | Active |
| AD4EC | 9 | 47 | 2023-05-18 | 2025-05-19 | Available |
| AD4ED | 9 | 43 | 2024-12-03 | 2026-12-04 | Canceled (grace period) |
| AD4EE | 9 | 37 | 2023-03-12 | 2025-03-13 | Available |
| AD4EF | 9 | 45 | 2003-05-18 | 2005-05-19 | Available |
| AD4EG | 8 | 45 | — | — | Available |
| AD4EH | 9 | 43 | 2013-05-18 | 2015-05-19 | Available |
| AD4EI | 10 | 39 | 2023-05-18 | 2025-05-19 | Available |
| AD4EJ | 10 | 49 | — | — | Available |
| AD4EK | 9 | 45 | — | — | Available |
| AD4EL | 9 | 45 | 2025-08-12 | 2027-08-13 | Canceled (grace period) |
| AD4EM | 8 | 43 | 2028-06-05 | — | Active (Vanity) |
| AD4EN | 10 | 41 | 2013-05-25 | 2015-05-26 | Available |
| AD4EO | 9 | 47 | 2034-12-14 | — | Active |
| AD4EP | 9 | 47 | — | — | Available |
| AD4EQ | 9 | 49 | 2023-05-25 | 2025-05-26 | Available |
| AD4ER | 10 | 43 | 2023-05-03 | 2025-05-04 | Available |
| AD4ES | 10 | 41 | 2033-05-28 | — | Active |
| AD4ET | 9 | 39 | 2036-02-20 | — | Active (Vanity) |
| AD4EU | 10 | 43 | 2003-06-01 | 2005-06-02 | Available |
| AD4EV | 9 | 45 | 2033-06-23 | — | Active |
| AD4EW | 9 | 45 | 2023-06-01 | 2025-06-02 | Available |
| AD4EX | 9 | 47 | 2033-06-01 | — | Active |
| AD4EY | 9 | 49 | 2021-08-27 | 2023-08-28 | Available |
| AD4EZ | 9 | 47 | 2024-10-30 | 2026-10-31 | Available |
| AD4FA | 9 | 49 | — | — | Available |
| AD4FB | 9 | 53 | 2025-09-11 | — | Active |
| AD4FC | 9 | 55 | 2006-02-14 | 2008-02-15 | Available |
| AD4FD | 9 | 51 | 2033-06-01 | — | Active |
| AD4FE | 9 | 45 | 2035-04-25 | — | Active |
| AD4FF | 9 | 53 | 2018-06-26 | 2020-06-27 | Available |
| AD4FG | 8 | 53 | 2013-06-01 | 2015-06-02 | Available |
| AD4FH | 9 | 51 | — | — | Available |
| AD4FI | 10 | 47 | 2023-06-01 | 2025-06-02 | Available |
| AD4FJ | 10 | 57 | 2023-06-01 | 2025-06-02 | Available |
| AD4FK | 9 | 53 | 2028-10-21 | — | Active (Vanity) |
| AD4FL | 9 | 53 | 2033-06-01 | — | Active |
| AD4FM | 8 | 51 | 2034-02-10 | — | Active (Vanity) |
| AD4FN | 10 | 49 | — | — | Available |
| AD4FO | 9 | 55 | 2033-06-01 | — | Active |
| AD4FP | 9 | 55 | 2033-06-01 | — | Active |
| AD4FQ | 9 | 57 | 2033-09-02 | — | Active |
| AD4FR | 10 | 51 | 2023-06-08 | 2025-06-09 | Available |
| AD4FS | 10 | 49 | — | — | Available |
| AD4FT | 9 | 47 | 2013-06-08 | 2015-06-09 | Available |
| AD4FU | 10 | 51 | — | — | Available |
| AD4FV | 9 | 53 | — | — | Available |
| AD4FW | 9 | 53 | — | — | Available |
| AD4FX | 9 | 55 | 2034-01-04 | — | Active |
| AD4FY | 9 | 57 | 2008-02-16 | 2010-02-17 | Available |
| AD4FZ | 9 | 55 | 2008-12-30 | 2010-12-31 | Available |
| AD4GA | 8 | 49 | 2034-01-03 | — | Active |
| AD4GB | 8 | 53 | 2034-06-08 | — | Active |
| AD4GC | 8 | 55 | 2032-10-16 | — | Active (Vanity) |
| AD4GD | 8 | 51 | 2013-06-08 | 2015-06-09 | Available |
| AD4GE | 8 | 45 | 2024-08-10 | 2026-08-11 | Available |
| AD4GF | 8 | 53 | 2013-06-08 | 2015-06-09 | Available |
| AD4GG | 7 | 53 | 2032-08-13 | — | Active (Vanity) |
| AD4GH | 8 | 51 | 2031-12-07 | — | Active (Vanity) |
| AD4GI | 9 | 47 | 2003-06-15 | 2005-06-16 | Available |
| AD4GJ | 9 | 57 | — | — | Available |
| AD4GK | 8 | 53 | 2033-06-22 | — | Active |
| AD4GL | 8 | 53 | 2023-06-22 | 2025-06-23 | Available |
| AD4GM | 7 | 51 | — | — | Available |
| AD4GN | 9 | 49 | 2025-12-09 | 2027-12-10 | Canceled (grace period) |
| AD4GO | 8 | 55 | 2013-06-29 | 2015-06-30 | Available |
| AD4GP | 8 | 55 | 2033-06-29 | — | Active |