District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AC4JO | 10 | 63 | 2013-05-20 | 2015-05-21 | Available |
| AC4JP | 10 | 63 | — | — | Available |
| AC4JQ | 10 | 65 | 2032-12-22 | — | Active |
| AC4JR | 11 | 59 | 2032-03-20 | — | Active |
| AC4JS | 11 | 57 | 1999-04-21 | 2001-04-22 | Available |
| AC4JT | 10 | 55 | 2032-03-22 | — | Active |
| AC4JU | 11 | 59 | 2034-10-16 | — | Active (Vanity) |
| AC4JV | 10 | 61 | 2032-06-16 | — | Active |
| AC4JW | 10 | 61 | 2031-10-01 | — | Active |
| AC4JX | 10 | 63 | 2012-02-28 | 2014-03-01 | Available |
| AC4JY | 10 | 65 | 1999-07-27 | 2001-07-28 | Available |
| AC4JZ | 10 | 63 | 2021-10-08 | 2023-10-09 | Available |
| AC4KA | 9 | 53 | 2021-10-08 | 2023-10-09 | Available |
| AC4KB | 9 | 57 | 2031-03-15 | — | Active (Vanity) |
| AC4KC | 9 | 59 | 2028-01-06 | — | Active (Vanity) |
| AC4KD | 9 | 55 | 2021-10-08 | 2023-10-09 | Available |
| AC4KE | 9 | 49 | — | — | Available |
| AC4KF | 9 | 57 | 2002-07-14 | 2004-07-15 | Available |
| AC4KG | 8 | 57 | 2021-10-15 | 2023-10-16 | Available |
| AC4KH | 9 | 55 | — | — | Available |
| AC4KI | 10 | 51 | — | — | Available |
| AC4KJ | 10 | 61 | 2011-10-15 | 2013-10-16 | Available |
| AC4KK | 9 | 57 | 2001-10-15 | 2003-10-16 | Available |
| AC4KL | 9 | 57 | 2010-01-01 | 2012-01-02 | Available |
| AC4KM | 8 | 55 | 2031-10-15 | — | Active |
| AC4KN | 10 | 53 | 2031-10-22 | — | Active |
| AC4KO | 9 | 59 | 2001-10-22 | 2003-10-23 | Available |
| AC4KP | 9 | 59 | 2021-10-22 | 2023-10-23 | Available |
| AC4KQ | 9 | 61 | 2011-10-22 | 2013-10-23 | Available |
| AC4KR | 10 | 55 | 2021-10-22 | 2023-10-23 | Available |
| AC4KS | 10 | 53 | 2031-11-02 | — | Active |
| AC4KT | 9 | 51 | 2024-12-06 | 2026-12-07 | Canceled (grace period) |
| AC4KU | 10 | 55 | 2026-08-23 | — | Active (Vanity) |
| AC4KV | 9 | 57 | 2035-10-24 | — | Active (Vanity) |
| AC4KW | 9 | 57 | 2028-11-14 | — | Active (Vanity) |
| AC4KX | 9 | 59 | 2011-10-29 | 2013-10-30 | Available |
| AC4KY | 9 | 61 | 2024-03-05 | 2026-03-06 | Available |
| AC4KZ | 9 | 59 | 2032-07-10 | — | Active |
| AC4LA | 9 | 53 | 2031-10-29 | — | Active |
| AC4LB | 9 | 57 | 2015-12-01 | 2017-12-02 | Available |
| AC4LC | 9 | 59 | — | — | Available |
| AC4LD | 9 | 55 | 2011-12-04 | 2013-12-05 | Available |
| AC4LE | 9 | 49 | 2000-07-08 | 2002-07-09 | Available |
| AC4LF | 9 | 57 | 2031-10-29 | — | Active |
| AC4LG | 8 | 57 | 2036-09-17 | — | Active (Vanity) |
| AC4LH | 9 | 55 | 2001-11-05 | 2003-11-06 | Available |
| AC4LI | 10 | 51 | 2021-11-05 | 2023-11-06 | Available |
| AC4LJ | 10 | 61 | 2029-09-18 | — | Active (Vanity) |
| AC4LK | 9 | 57 | 2001-11-12 | 2003-11-13 | Available |
| AC4LL | 9 | 57 | 2036-08-16 | — | Active (Vanity) |
| AC4LM | 8 | 55 | 1997-08-25 | 1999-08-26 | Available |
| AC4LN | 10 | 53 | 2031-11-19 | — | Active |
| AC4LO | 9 | 59 | 2036-10-20 | — | Active (Vanity) |
| AC4LP | 9 | 59 | 2021-11-19 | 2023-11-20 | Available |
| AC4LQ | 9 | 61 | 2001-11-19 | 2003-11-20 | Available |
| AC4LR | 10 | 55 | 2035-07-19 | — | Active (Vanity) |
| AC4LS | 10 | 53 | 2031-11-26 | — | Active |
| AC4LT | 9 | 51 | 2031-03-27 | — | Active (Vanity) |
| AC4LU | 10 | 55 | 2036-11-03 | — | Active (Vanity) |
| AC4LV | 9 | 57 | 2031-12-03 | — | Active |
| AC4LW | 9 | 57 | 2021-12-03 | 2023-12-04 | Available |
| AC4LX | 9 | 59 | 2031-12-03 | — | Active |
| AC4LY | 9 | 61 | 2021-12-03 | 2023-12-04 | Available |
| AC4LZ | 9 | 59 | 2026-01-09 | — | Active (Vanity) |
| AC4MA | 8 | 51 | — | — | Available |
| AC4MB | 8 | 55 | 2033-01-03 | — | Active |
| AC4MC | 8 | 57 | 2030-02-11 | — | Active (Vanity) |
| AC4MD | 8 | 53 | 2031-12-24 | — | Active |
| AC4ME | 8 | 47 | 2033-10-05 | — | Active |
| AC4MF | 8 | 55 | 2031-12-10 | — | Active |
| AC4MG | 7 | 55 | 2035-01-30 | — | Active (Vanity) |
| AC4MH | 8 | 53 | 2001-12-10 | 2003-12-11 | Available |
| AC4MI | 9 | 49 | — | — | Available |
| AC4MJ | 9 | 59 | — | — | Available |
| AC4MK | 8 | 55 | 2031-12-31 | — | Active |
| AC4ML | 8 | 55 | 2027-12-29 | — | Active (Vanity) |
| AC4MM | 7 | 53 | 2031-12-31 | — | Active |
| AC4MN | 9 | 51 | 2032-08-15 | — | Active |
| AC4MO | 8 | 57 | 2011-03-15 | 2013-03-16 | Available |
| AC4MP | 8 | 57 | 2036-04-05 | — | Active (Vanity) |
| AC4MQ | 8 | 59 | 2012-01-30 | 2014-01-31 | Available |
| AC4MR | 9 | 53 | 2034-07-12 | — | Active (Vanity) |
| AC4MS | 9 | 51 | 2012-01-07 | 2014-01-08 | Available |
| AC4MT | 8 | 49 | 2028-03-23 | — | Active (Vanity) |
| AC4MU | 9 | 53 | 2032-01-07 | — | Active |
| AC4MV | 8 | 55 | 2016-12-16 | 2018-12-17 | Available |
| AC4MW | 8 | 55 | 2034-04-19 | — | Active (Vanity) |
| AC4MX | 8 | 57 | 2012-01-14 | 2014-01-15 | Available |
| AC4MY | 8 | 59 | 2001-09-24 | 2003-09-25 | Available |
| AC4MZ | 8 | 57 | 2012-01-21 | 2014-01-22 | Available |
| AC4NA | 10 | 49 | 2032-01-21 | — | Active |
| AC4NB | 10 | 53 | 2033-08-03 | — | Active |
| AC4NC | 10 | 55 | 2032-01-28 | — | Active |
| AC4ND | 10 | 51 | 2002-01-28 | 2004-01-29 | Available |
| AC4NE | 10 | 45 | 2036-01-23 | — | Active (Vanity) |
| AC4NF | 10 | 53 | 2002-02-04 | 2004-02-05 | Available |
| AC4NG | 9 | 53 | 2022-02-04 | 2024-02-05 | Available |
| AC4NH | 10 | 51 | 2022-03-01 | 2024-03-02 | Available |
| AC4NI | 11 | 47 | 2024-04-05 | 2026-04-06 | Available |
| AC4NJ | 11 | 57 | — | — | Available |