District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AC4RG | 9 | 55 | 2029-07-23 | — | Active |
| AC4RH | 10 | 53 | 2023-06-22 | 2025-06-23 | Available |
| AC4RI | 11 | 49 | 2027-10-10 | — | Active (Vanity) |
| AC4RJ | 11 | 59 | 2028-06-12 | — | Active (Vanity) |
| AC4RK | 10 | 55 | 2033-03-27 | — | Active |
| AC4RL | 10 | 55 | 2032-06-09 | — | Active |
| AC4RM | 9 | 53 | 2020-12-07 | 2022-12-08 | Available |
| AC4RN | 11 | 51 | 2032-06-09 | — | Active |
| AC4RO | 10 | 57 | 2032-06-16 | — | Active |
| AC4RP | 10 | 57 | 2022-06-16 | 2024-06-17 | Available |
| AC4RQ | 10 | 59 | 2033-06-01 | — | Active |
| AC4RR | 11 | 53 | 2036-07-29 | — | Active (Vanity) |
| AC4RS | 11 | 51 | 2030-02-19 | — | Active (Vanity) |
| AC4RT | 10 | 49 | 2032-06-23 | — | Active |
| AC4RU | 11 | 53 | 2032-06-23 | — | Active |
| AC4RV | 10 | 55 | 2032-08-16 | — | Active |
| AC4RW | 10 | 55 | 2028-08-14 | — | Active (Vanity) |
| AC4RX | 10 | 57 | 2032-07-03 | — | Active |
| AC4RY | 10 | 59 | 2022-06-23 | 2024-06-24 | Available |
| AC4RZ | 10 | 57 | 2022-06-23 | 2024-06-24 | Available |
| AC4SA | 10 | 49 | 2033-12-10 | — | Active (Vanity) |
| AC4SB | 10 | 53 | 2022-07-28 | 2024-07-29 | Available |
| AC4SC | 10 | 55 | 2022-06-30 | 2024-07-01 | Available |
| AC4SD | 10 | 51 | 2022-06-30 | 2024-07-01 | Available |
| AC4SE | 10 | 45 | 2013-01-14 | 2015-01-15 | Available |
| AC4SF | 10 | 53 | 2007-10-16 | 2009-10-17 | Available |
| AC4SG | 9 | 53 | 2031-08-03 | — | Active (Vanity) |
| AC4SH | 10 | 51 | 2032-07-07 | — | Active |
| AC4SI | 11 | 47 | 2033-10-19 | — | Active |
| AC4SJ | 11 | 57 | 2029-08-23 | — | Active (Vanity) |
| AC4SK | 10 | 53 | 2035-07-22 | — | Active (Vanity) |
| AC4SL | 10 | 53 | 2002-09-10 | 2004-09-11 | Available |
| AC4SM | 9 | 51 | 2032-07-14 | — | Active |
| AC4SN | 11 | 49 | — | — | Available |
| AC4SO | 10 | 55 | 2032-07-14 | — | Active |
| AC4SP | 10 | 55 | 2035-08-15 | — | Active (Vanity) |
| AC4SQ | 10 | 57 | 2022-09-20 | 2024-09-21 | Available |
| AC4SR | 11 | 51 | 2019-11-02 | 2021-11-03 | Available |
| AC4SS | 11 | 49 | 2022-07-14 | 2024-07-15 | Available |
| AC4ST | 10 | 47 | 2033-09-03 | — | Active |
| AC4SU | 11 | 51 | 2022-07-21 | 2024-07-22 | Available |
| AC4SV | 10 | 53 | — | — | Available |
| AC4SW | 10 | 53 | 2033-02-24 | — | Active |
| AC4SX | 10 | 55 | 2002-07-21 | 2004-07-22 | Available |
| AC4SY | 10 | 57 | — | — | Available |
| AC4SZ | 10 | 55 | 2012-07-21 | 2014-07-22 | Available |
| AC4TA | 9 | 47 | 2012-07-21 | 2014-07-22 | Available |
| AC4TB | 9 | 51 | 2029-08-11 | — | Active (Vanity) |
| AC4TC | 9 | 53 | 2035-03-29 | — | Active (Vanity) |
| AC4TD | 9 | 49 | 2035-05-16 | — | Active (Vanity) |
| AC4TE | 9 | 43 | 2032-07-21 | — | Active |
| AC4TF | 9 | 51 | 2022-07-21 | 2024-07-22 | Available |
| AC4TG | 8 | 51 | — | — | Available |
| AC4TH | 9 | 49 | 2012-08-09 | 2014-08-10 | Available |
| AC4TI | 10 | 45 | 2012-07-28 | 2014-07-29 | Available |
| AC4TJ | 10 | 55 | 2026-07-07 | 2028-07-08 | Canceled (grace period) |
| AC4TK | 9 | 51 | 2022-07-28 | 2024-07-29 | Available |
| AC4TL | 9 | 51 | — | — | Available |
| AC4TM | 8 | 49 | 2030-03-12 | — | Active (Vanity) |
| AC4TN | 10 | 47 | 2035-09-03 | — | Active (Vanity) |
| AC4TO | 9 | 53 | 2033-07-27 | — | Active |
| AC4TP | 9 | 53 | 2022-08-04 | 2024-08-05 | Available |
| AC4TQ | 9 | 55 | — | — | Available |
| AC4TR | 10 | 49 | 2035-04-17 | — | Active (Vanity) |
| AC4TS | 10 | 47 | — | — | Available |
| AC4TT | 9 | 45 | 2025-03-22 | — | Active (Vanity) |
| AC4TU | 10 | 49 | — | — | Available |
| AC4TV | 9 | 51 | 2012-08-04 | 2014-08-05 | Available |
| AC4TW | 9 | 51 | 2022-08-04 | 2024-08-05 | Available |
| AC4TX | 9 | 53 | 2033-05-18 | — | Active |
| AC4TY | 9 | 55 | 2033-06-22 | — | Active |
| AC4TZ | 9 | 53 | 2022-08-07 | 2024-08-08 | Available |
| AC4UA | 10 | 51 | 2022-08-11 | 2024-08-12 | Available |
| AC4UB | 10 | 55 | 2012-08-11 | 2014-08-12 | Available |
| AC4UC | 10 | 57 | 2034-03-22 | — | Active |
| AC4UD | 10 | 53 | 2014-03-15 | 2016-03-16 | Available |
| AC4UE | 10 | 47 | 2012-08-11 | 2014-08-12 | Available |
| AC4UF | 10 | 55 | 2032-08-11 | — | Active |
| AC4UG | 9 | 55 | 2032-08-11 | — | Active |
| AC4UH | 10 | 53 | 2032-08-11 | — | Active |
| AC4UI | 11 | 49 | 2022-08-11 | 2024-08-12 | Available |
| AC4UJ | 11 | 59 | 2012-08-18 | 2014-08-19 | Available |
| AC4UK | 10 | 55 | 2031-03-23 | — | Active (Vanity) |
| AC4UL | 10 | 55 | 2015-08-27 | 2017-08-28 | Available |
| AC4UM | 9 | 53 | 2019-05-04 | 2021-05-05 | Available |
| AC4UN | 11 | 51 | — | — | Available |
| AC4UO | 10 | 57 | 2010-05-19 | 2012-05-20 | Available |
| AC4UP | 10 | 57 | — | — | Available |
| AC4UQ | 10 | 59 | — | — | Available |
| AC4UR | 11 | 53 | 2032-03-07 | — | Active (Vanity) |
| AC4US | 11 | 51 | 2019-02-05 | 2021-02-06 | Available |
| AC4UT | 10 | 49 | 2035-05-21 | — | Active (Vanity) |
| AC4UU | 11 | 53 | 1999-03-31 | 2001-04-01 | Available |
| AC4UV | 10 | 55 | 2033-08-31 | — | Active |
| AC4UW | 10 | 55 | 2012-08-25 | 2014-08-26 | Available |
| AC4UX | 10 | 57 | 2022-09-17 | 2024-09-18 | Available |
| AC4UY | 10 | 59 | — | — | Available |
| AC4UZ | 10 | 57 | 2022-09-01 | 2024-09-02 | Available |
| AC4VA | 9 | 53 | 2004-10-01 | 2006-10-02 | Available |
| AC4VB | 9 | 57 | 2032-09-01 | — | Active |