District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AC4NK | 10 | 53 | 2035-06-21 | — | Active (Vanity) |
| AC4NL | 10 | 53 | 2032-02-11 | — | Active |
| AC4NM | 9 | 51 | 2029-03-26 | — | Active (Vanity) |
| AC4NN | 11 | 49 | 2012-02-11 | 2014-02-12 | Available |
| AC4NO | 10 | 55 | 2013-08-13 | 2015-08-14 | Available |
| AC4NP | 10 | 55 | 2032-02-11 | — | Active |
| AC4NQ | 10 | 57 | — | — | Available |
| AC4NR | 11 | 51 | 2032-02-11 | — | Active |
| AC4NS | 11 | 49 | 2022-02-11 | 2024-02-12 | Available |
| AC4NT | 10 | 47 | 2033-06-23 | — | Active |
| AC4NU | 11 | 51 | 2032-02-18 | — | Active |
| AC4NV | 10 | 53 | 2022-02-18 | 2024-02-19 | Available |
| AC4NW | 10 | 53 | 2014-02-08 | 2016-02-09 | Available |
| AC4NX | 10 | 55 | 2013-01-22 | 2015-01-23 | Available |
| AC4NY | 10 | 57 | 2032-02-25 | — | Active |
| AC4NZ | 10 | 55 | — | — | Available |
| AC4OA | 9 | 55 | 1999-02-03 | 2001-02-04 | Available |
| AC4OB | 9 | 59 | 2022-03-03 | 2024-03-04 | Available |
| AC4OC | 9 | 61 | — | — | Available |
| AC4OD | 9 | 57 | 2012-03-03 | 2014-03-04 | Available |
| AC4OE | 9 | 51 | 2002-03-03 | 2004-03-04 | Available |
| AC4OF | 9 | 59 | 2012-03-03 | 2014-03-04 | Available |
| AC4OG | 8 | 59 | 2034-10-29 | — | Active (Vanity) |
| AC4OH | 9 | 57 | 2014-05-24 | 2016-05-25 | Available |
| AC4OI | 10 | 53 | — | — | Available |
| AC4OJ | 10 | 63 | 2012-09-28 | 2014-09-29 | Available |
| AC4OK | 9 | 59 | 2026-06-05 | 2028-06-06 | Canceled (grace period) |
| AC4OL | 9 | 59 | 2022-03-17 | 2024-03-18 | Available |
| AC4OM | 8 | 57 | 2036-09-04 | — | Active (Vanity) |
| AC4ON | 10 | 55 | 2021-04-17 | 2023-04-18 | Available |
| AC4OO | 9 | 61 | 2012-03-17 | 2014-03-18 | Available |
| AC4OP | 9 | 61 | — | — | Available |
| AC4OQ | 9 | 63 | 2032-03-24 | — | Active |
| AC4OR | 10 | 57 | 2022-08-09 | 2024-08-10 | Available |
| AC4OS | 10 | 55 | 2032-03-24 | — | Active |
| AC4OT | 9 | 53 | — | — | Available |
| AC4OU | 10 | 57 | 2032-03-31 | — | Active |
| AC4OV | 9 | 59 | 2010-03-10 | 2012-03-11 | Available |
| AC4OW | 9 | 59 | 2032-10-30 | — | Active |
| AC4OX | 9 | 61 | 2002-03-31 | 2004-04-01 | Available |
| AC4OY | 9 | 63 | 2023-08-01 | 2025-08-02 | Available |
| AC4OZ | 9 | 61 | 2022-11-17 | 2024-11-18 | Available |
| AC4PA | 9 | 55 | 2033-02-05 | — | Active (Vanity) |
| AC4PB | 9 | 59 | 2034-05-01 | — | Active |
| AC4PC | 9 | 61 | 2028-01-30 | — | Active (Vanity) |
| AC4PD | 9 | 57 | 2008-12-30 | 2010-12-31 | Available |
| AC4PE | 9 | 51 | 2012-04-07 | 2014-04-08 | Available |
| AC4PF | 9 | 59 | 2032-04-10 | — | Active |
| AC4PG | 8 | 59 | 2032-04-07 | — | Active |
| AC4PH | 9 | 57 | 2012-04-07 | 2014-04-08 | Available |
| AC4PI | 10 | 53 | 2012-04-07 | 2014-04-08 | Available |
| AC4PJ | 10 | 63 | 2022-04-07 | 2024-04-08 | Available |
| AC4PK | 9 | 59 | 2016-06-14 | 2018-06-15 | Available |
| AC4PL | 9 | 59 | 2021-09-07 | 2023-09-08 | Available |
| AC4PM | 8 | 57 | 2024-05-17 | 2026-05-18 | Available |
| AC4PN | 10 | 55 | 2012-04-14 | 2014-04-15 | Available |
| AC4PO | 9 | 61 | 2033-02-22 | — | Active |
| AC4PP | 9 | 61 | 2022-04-14 | 2024-04-15 | Available |
| AC4PQ | 9 | 63 | 2032-04-14 | — | Active |
| AC4PR | 10 | 57 | — | — | Available |
| AC4PS | 10 | 55 | 2036-09-13 | — | Active (Vanity) |
| AC4PT | 9 | 53 | 2032-04-21 | — | Active |
| AC4PU | 10 | 57 | 2012-04-21 | 2014-04-22 | Available |
| AC4PV | 9 | 59 | 2022-04-21 | 2024-04-22 | Available |
| AC4PW | 9 | 59 | 2022-04-21 | 2024-04-22 | Available |
| AC4PX | 9 | 61 | 2022-04-28 | 2024-04-29 | Available |
| AC4PY | 9 | 63 | 2010-02-06 | 2012-02-07 | Available |
| AC4PZ | 9 | 61 | — | — | Available |
| AC4QA | 9 | 57 | — | — | Available |
| AC4QB | 9 | 61 | 2032-04-28 | — | Active |
| AC4QC | 9 | 63 | 2034-04-24 | — | Active |
| AC4QD | 9 | 59 | 2034-03-21 | — | Active |
| AC4QE | 9 | 53 | 2014-08-19 | 2016-08-20 | Available |
| AC4QF | 9 | 61 | — | — | Available |
| AC4QG | 8 | 61 | 2002-05-05 | 2004-05-06 | Available |
| AC4QH | 9 | 59 | 2022-05-12 | 2024-05-13 | Available |
| AC4QI | 10 | 55 | 2022-03-03 | 2024-03-04 | Available |
| AC4QJ | 10 | 65 | 2032-05-12 | — | Active |
| AC4QK | 9 | 61 | 2032-05-12 | — | Active |
| AC4QL | 9 | 61 | — | — | Available |
| AC4QM | 8 | 59 | 2032-09-14 | — | Active |
| AC4QN | 10 | 57 | 2032-05-19 | — | Active |
| AC4QO | 9 | 63 | — | — | Available |
| AC4QP | 9 | 63 | 2033-01-25 | — | Active |
| AC4QQ | 9 | 65 | 2022-05-19 | 2024-05-20 | Available |
| AC4QR | 10 | 59 | — | — | Available |
| AC4QS | 10 | 57 | 2033-11-09 | — | Active |
| AC4QT | 9 | 55 | — | — | Available |
| AC4QU | 10 | 59 | 2011-06-12 | 2013-06-13 | Available |
| AC4QV | 9 | 61 | 2023-03-30 | 2025-03-31 | Available |
| AC4QW | 9 | 61 | 2032-06-09 | — | Active |
| AC4QX | 9 | 63 | 2022-06-02 | 2024-06-03 | Available |
| AC4QY | 9 | 65 | — | — | Available |
| AC4QZ | 9 | 63 | 2032-06-02 | — | Active |
| AC4RA | 10 | 51 | 2022-06-02 | 2024-06-03 | Available |
| AC4RB | 10 | 55 | 2032-07-27 | — | Active |
| AC4RC | 10 | 57 | 2027-03-27 | — | Active (Vanity) |
| AC4RD | 10 | 53 | 2034-05-01 | — | Active |
| AC4RE | 10 | 47 | 2022-06-09 | 2024-06-10 | Available |
| AC4RF | 10 | 55 | 2029-08-17 | — | Active (Vanity) |