District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AC4YY | 9 | 65 | 2033-01-05 | — | Active |
| AC4YZ | 9 | 63 | — | — | Available |
| AC4ZA | 9 | 55 | 2013-10-09 | 2015-10-10 | Available |
| AC4ZB | 9 | 59 | — | — | Available |
| AC4ZC | 9 | 61 | — | — | Available |
| AC4ZD | 9 | 57 | 2007-03-20 | 2009-03-21 | Available |
| AC4ZE | 9 | 51 | 2034-03-22 | — | Active |
| AC4ZF | 9 | 59 | 2024-03-05 | 2026-03-06 | Available |
| AC4ZG | 8 | 59 | — | — | Available |
| AC4ZH | 9 | 57 | 2033-01-12 | — | Active |
| AC4ZI | 10 | 53 | 2023-01-19 | — | Active |
| AC4ZJ | 10 | 63 | 2023-01-19 | 2025-01-20 | Available |
| AC4ZK | 9 | 59 | 2013-01-19 | 2015-01-20 | Available |
| AC4ZL | 9 | 59 | 2003-01-26 | 2005-01-27 | Available |
| AC4ZM | 8 | 57 | 2032-10-05 | — | Active (Vanity) |
| AC4ZN | 10 | 55 | 2003-01-26 | 2005-01-27 | Available |
| AC4ZO | 9 | 61 | 2023-01-26 | 2025-01-27 | Available |
| AC4ZP | 9 | 61 | 2033-01-26 | — | Active |
| AC4ZQ | 9 | 63 | 2033-02-11 | — | Active |
| AC4ZR | 10 | 57 | 2033-12-07 | — | Active |
| AC4ZS | 10 | 55 | 2013-01-26 | 2015-01-27 | Available |
| AC4ZT | 9 | 53 | 2004-09-04 | 2006-09-05 | Available |
| AC4ZU | 10 | 57 | 2033-02-25 | — | Active |
| AC4ZV | 9 | 59 | 2013-02-02 | 2015-02-03 | Available |
| AC4ZW | 9 | 59 | — | — | Available |
| AC4ZX | 9 | 61 | 2025-11-19 | 2027-11-20 | Canceled (grace period) |
| AC4ZY | 9 | 63 | 2024-09-21 | 2026-09-22 | Available |
| AC4ZZ | 9 | 61 | 2023-02-02 | 2025-02-03 | Available |
| AD4AA | 9 | 45 | 2033-02-02 | — | Active |
| AD4AB | 9 | 49 | 2033-05-24 | — | Active |
| AD4AC | 9 | 51 | 2033-11-01 | — | Active |
| AD4AD | 9 | 47 | 2033-03-07 | — | Active |
| AD4AE | 9 | 41 | 2033-02-16 | — | Active |
| AD4AF | 9 | 49 | — | — | Available |
| AD4AG | 8 | 49 | — | — | Available |
| AD4AH | 9 | 47 | 1999-04-08 | 2001-04-09 | Available |
| AD4AI | 10 | 43 | 2013-10-28 | 2015-10-29 | Available |
| AD4AJ | 10 | 53 | 2034-10-11 | — | Active (Vanity) |
| AD4AK | 9 | 49 | 2036-06-21 | — | Active (Vanity) |
| AD4AL | 9 | 49 | 2035-10-01 | — | Active |
| AD4AM | 8 | 47 | 2033-02-16 | — | Active |
| AD4AN | 10 | 45 | 2029-03-15 | — | Active (Vanity) |
| AD4AO | 9 | 51 | — | — | Available |
| AD4AP | 9 | 51 | — | — | Available |
| AD4AQ | 9 | 53 | 2007-04-20 | 2009-04-21 | Available |
| AD4AR | 10 | 47 | 2025-11-06 | — | Active (Vanity) |
| AD4AS | 10 | 45 | 2030-11-10 | — | Active (Vanity) |
| AD4AT | 9 | 43 | 2017-09-26 | 2019-09-27 | Available |
| AD4AU | 10 | 47 | 2013-03-02 | 2015-03-03 | Available |
| AD4AV | 9 | 49 | 2035-12-09 | — | Active (Vanity) |
| AD4AW | 9 | 49 | 1999-04-28 | 2001-04-29 | Available |
| AD4AX | 9 | 51 | 2033-03-02 | — | Active |
| AD4AY | 9 | 53 | — | — | Available |
| AD4AZ | 9 | 51 | 2009-01-06 | 2011-01-07 | Available |
| AD4BA | 9 | 49 | 2033-05-02 | — | Active |
| AD4BB | 9 | 53 | 2031-07-02 | — | Active (Vanity) |
| AD4BC | 9 | 55 | 2036-05-08 | — | Active (Vanity) |
| AD4BD | 9 | 51 | 2003-03-02 | 2005-03-03 | Available |
| AD4BE | 9 | 45 | 2028-09-05 | — | Active (Vanity) |
| AD4BF | 9 | 53 | 2034-01-07 | — | Active (Vanity) |
| AD4BG | 8 | 53 | 2019-01-25 | 2021-01-26 | Available |
| AD4BH | 9 | 51 | 2033-03-02 | — | Active |
| AD4BI | 10 | 47 | 2034-02-08 | — | Active |
| AD4BJ | 10 | 57 | 2033-03-02 | — | Active |
| AD4BK | 9 | 53 | 1999-11-30 | 2001-12-01 | Available |
| AD4BL | 9 | 53 | 2033-03-09 | — | Active |
| AD4BM | 8 | 51 | 2036-01-17 | — | Active (Vanity) |
| AD4BN | 10 | 49 | — | — | Available |
| AD4BO | 9 | 55 | 2024-09-11 | 2026-09-12 | Available |
| AD4BP | 9 | 55 | 2032-06-04 | — | Active (Vanity) |
| AD4BQ | 9 | 57 | 2000-10-24 | 2002-10-25 | Available |
| AD4BR | 10 | 51 | 2028-01-26 | — | Active (Vanity) |
| AD4BS | 10 | 49 | 2033-08-10 | — | Active |
| AD4BT | 9 | 47 | 2023-03-16 | 2025-03-17 | Available |
| AD4BU | 10 | 51 | 2013-03-23 | 2015-03-24 | Available |
| AD4BV | 9 | 53 | 2013-03-23 | 2015-03-24 | Available |
| AD4BW | 9 | 53 | — | — | Available |
| AD4BX | 9 | 55 | 2000-09-30 | 2002-10-01 | Available |
| AD4BY | 9 | 57 | 2013-03-23 | 2015-03-24 | Available |
| AD4BZ | 9 | 55 | 1999-11-17 | 2001-11-18 | Available |
| AD4CA | 9 | 51 | 2013-03-23 | 2015-03-24 | Available |
| AD4CB | 9 | 55 | 2033-04-11 | — | Active |
| AD4CC | 9 | 57 | 2033-04-06 | — | Active |
| AD4CD | 9 | 53 | 2011-01-21 | 2013-01-22 | Available |
| AD4CE | 9 | 47 | 2034-06-24 | — | Active (Vanity) |
| AD4CF | 9 | 55 | — | — | Available |
| AD4CG | 8 | 55 | 2033-03-30 | — | Active |
| AD4CH | 9 | 53 | 2031-04-06 | — | Active (Vanity) |
| AD4CI | 10 | 49 | 2003-03-30 | 2005-03-31 | Available |
| AD4CJ | 10 | 59 | 2033-08-24 | — | Active |
| AD4CK | 9 | 55 | 2013-03-30 | 2015-03-31 | Available |
| AD4CL | 9 | 55 | 2035-09-20 | — | Active (Vanity) |
| AD4CM | 8 | 53 | 2033-04-13 | — | Active |
| AD4CN | 10 | 51 | — | — | Available |
| AD4CO | 9 | 57 | 2013-04-13 | 2015-04-14 | Available |
| AD4CP | 9 | 57 | 2023-06-22 | 2025-06-23 | Available |
| AD4CQ | 9 | 59 | 2027-06-22 | — | Active (Vanity) |
| AD4CR | 10 | 53 | 2033-04-13 | — | Active |
| AD4CS | 10 | 51 | 2017-05-13 | 2019-05-14 | Available |
| AD4CT | 9 | 49 | 2020-02-25 | 2022-02-26 | Available |