District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KU4JO | 11 | 63 | 1998-12-15 | 2000-12-16 | Available |
| KU4JP | 11 | 63 | 2005-03-13 | 2007-03-14 | Available |
| KU4JQ | 11 | 65 | 1997-09-09 | 1999-09-10 | Available |
| KU4JR | 12 | 59 | 2017-05-26 | 2019-05-27 | Available |
| KU4JS | 12 | 57 | 2035-07-17 | — | Active |
| KU4JT | 11 | 55 | 1997-11-18 | 1999-11-19 | Available |
| KU4JU | 12 | 59 | 2002-04-03 | 2004-04-04 | Available |
| KU4JV | 11 | 61 | 1997-09-20 | 1999-09-21 | Available |
| KU4JW | 11 | 61 | 2000-07-29 | 2002-07-30 | Available |
| KU4JX | 11 | 63 | 1999-01-13 | 2001-01-14 | Available |
| KU4JY | 11 | 65 | 2033-05-04 | — | Active |
| KU4JZ | 11 | 63 | 2033-01-05 | — | Active |
| KU4KA | 10 | 53 | 2006-12-23 | 2008-12-24 | Available |
| KU4KB | 10 | 57 | 1997-10-21 | 1999-10-22 | Available |
| KU4KC | 10 | 59 | 2007-08-27 | 2009-08-28 | Available |
| KU4KD | 10 | 55 | 2027-08-27 | — | Active |
| KU4KE | 10 | 49 | 1997-10-16 | 1999-10-17 | Available |
| KU4KF | 10 | 57 | 1998-03-20 | 2000-03-21 | Available |
| KU4KG | 9 | 57 | 1997-09-09 | 1999-09-10 | Available |
| KU4KH | 10 | 55 | 2023-07-27 | 2025-07-28 | Available |
| KU4KI | 11 | 51 | 2015-10-13 | 2017-10-14 | Available |
| KU4KJ | 11 | 61 | 1997-10-28 | 1999-10-29 | Available |
| KU4KK | 10 | 57 | 2014-05-24 | 2016-05-25 | Available |
| KU4KL | 10 | 57 | 1998-05-21 | 2000-05-22 | Available |
| KU4KM | 9 | 55 | 2032-06-09 | — | Active |
| KU4KN | 11 | 53 | 2016-10-02 | 2018-10-03 | Available |
| KU4KO | 10 | 59 | 2022-04-12 | 2024-04-13 | Available |
| KU4KP | 10 | 59 | 2007-09-15 | 2009-09-16 | Available |
| KU4KQ | 10 | 61 | 2027-04-21 | — | Active |
| KU4KR | 11 | 55 | 2017-07-08 | 2019-07-09 | Available |
| KU4KS | 11 | 53 | 2032-08-26 | — | Active (Vanity) |
| KU4KT | 10 | 51 | 2009-05-08 | 2011-05-09 | Available |
| KU4KU | 11 | 55 | 1997-10-30 | 1999-10-31 | Available |
| KU4KV | 10 | 57 | 2027-06-10 | — | Active |
| KU4KW | 10 | 57 | 2023-08-01 | 2025-08-02 | Available |
| KU4KX | 10 | 59 | 1997-11-24 | 1999-11-25 | Available |
| KU4KY | 10 | 61 | 2024-03-05 | 2026-03-06 | Available |
| KU4KZ | 10 | 59 | 2022-07-07 | 2024-07-08 | Available |
| KU4LA | 10 | 53 | 2004-06-14 | 2006-06-15 | Available |
| KU4LB | 10 | 57 | 1997-12-30 | 1999-12-31 | Available |
| KU4LC | 10 | 59 | 2034-09-20 | — | Active (Vanity) |
| KU4LD | 10 | 55 | 1998-10-05 | 2000-10-06 | Available |
| KU4LE | 10 | 49 | 2007-10-03 | 2009-10-04 | Available |
| KU4LF | 10 | 57 | 2018-07-25 | 2020-07-26 | Available |
| KU4LG | 9 | 57 | 1998-04-01 | 2000-04-02 | Available |
| KU4LH | 10 | 55 | 2026-01-12 | — | Active |
| KU4LI | 11 | 51 | 1997-11-19 | 1999-11-20 | Available |
| KU4LJ | 11 | 61 | 2007-06-27 | 2009-06-28 | Available |
| KU4LK | 10 | 57 | 2000-12-05 | 2002-12-06 | Available |
| KU4LL | 10 | 57 | 2035-05-28 | — | Active |
| KU4LM | 9 | 55 | 1998-01-16 | 2000-01-17 | Available |
| KU4LN | 11 | 53 | 2026-08-13 | — | Active |
| KU4LO | 10 | 59 | 2018-11-24 | 2020-11-25 | Available |
| KU4LP | 10 | 59 | 2007-09-15 | 2009-09-16 | Available |
| KU4LQ | 10 | 61 | 2014-01-18 | 2016-01-19 | Available |
| KU4LR | 11 | 55 | 2012-03-03 | 2014-03-04 | Available |
| KU4LS | 11 | 53 | 2027-10-24 | — | Active |
| KU4LT | 10 | 51 | 2004-08-03 | 2006-08-04 | Available |
| KU4LU | 11 | 55 | 2029-01-19 | — | Active |
| KU4LV | 10 | 57 | 2015-06-03 | 2017-06-04 | Available |
| KU4LW | 10 | 57 | 2010-03-03 | 2012-03-04 | Available |
| KU4LX | 10 | 59 | 2023-03-23 | 2025-03-24 | Available |
| KU4LY | 10 | 61 | 2027-08-23 | — | Active |
| KU4LZ | 10 | 59 | 2027-11-10 | — | Active |
| KU4MA | 9 | 51 | 2027-11-10 | — | Active |
| KU4MB | 9 | 55 | 2027-08-14 | — | Active |
| KU4MC | 9 | 57 | 2035-12-04 | — | Active |
| KU4MD | 9 | 53 | 2027-02-22 | — | Active |
| KU4ME | 9 | 47 | 2034-11-22 | — | Active |
| KU4MF | 9 | 55 | 2016-02-01 | 2018-02-02 | Available |
| KU4MG | 8 | 55 | 2023-07-06 | 2025-07-07 | Available |
| KU4MH | 9 | 53 | 2027-02-24 | — | Active |
| KU4MI | 10 | 49 | 1998-01-06 | 2000-01-07 | Available |
| KU4MJ | 10 | 59 | 2024-11-21 | — | Active |
| KU4MK | 9 | 55 | 2007-11-19 | 2009-11-20 | Available |
| KU4ML | 9 | 55 | 2035-01-18 | — | Active |
| KU4MM | 8 | 53 | 2024-05-24 | 2026-05-25 | Available |
| KU4MN | 10 | 51 | 2027-02-21 | — | Active |
| KU4MO | 9 | 57 | 2017-05-27 | 2019-05-28 | Available |
| KU4MP | 9 | 57 | 2027-11-24 | — | Active |
| KU4MQ | 9 | 59 | 2028-11-24 | — | Active |
| KU4MR | 10 | 53 | 2017-11-28 | 2019-11-29 | Available |
| KU4MS | 10 | 51 | 2031-04-02 | — | Active |
| KU4MT | 9 | 49 | 2027-08-29 | — | Active (Vanity) |
| KU4MU | 10 | 53 | 1998-03-31 | 2000-04-01 | Available |
| KU4MV | 9 | 55 | 2017-12-02 | 2019-12-03 | Available |
| KU4MW | 9 | 55 | 1997-12-24 | 1999-12-25 | Available |
| KU4MX | 9 | 57 | 2027-11-12 | — | Active |
| KU4MY | 9 | 59 | 2007-10-10 | 2009-10-11 | Available |
| KU4MZ | 9 | 57 | 2027-12-20 | — | Active |
| KU4NA | 11 | 49 | 2026-03-11 | — | Active |
| KU4NB | 11 | 53 | 1998-02-20 | 2000-02-21 | Available |
| KU4NC | 11 | 55 | 2035-03-25 | — | Active (Vanity) |
| KU4ND | 11 | 51 | 2005-08-05 | 2007-08-06 | Available |
| KU4NE | 11 | 45 | 2026-12-19 | — | Active |
| KU4NF | 11 | 53 | 2029-01-28 | — | Active |
| KU4NG | 10 | 53 | 1998-03-03 | 2000-03-04 | Available |
| KU4NH | 11 | 51 | 2027-06-12 | — | Active |
| KU4NI | 12 | 47 | 2026-02-21 | — | Active |
| KU4NJ | 12 | 57 | 2034-02-01 | — | Active |