District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KO4UI | 11 | 53 | 2023-03-23 | 2025-03-24 | Available |
| KO4UJ | 11 | 63 | 2012-03-24 | 2014-03-25 | Available |
| KO4UK | 10 | 59 | 2030-02-21 | — | Active (Vanity) |
| KO4UL | 10 | 59 | 2022-03-31 | 2024-04-01 | Available |
| KO4UM | 9 | 57 | — | — | Available |
| KO4UN | 11 | 55 | — | — | Available |
| KO4UO | 10 | 61 | 2012-03-31 | 2014-04-01 | Available |
| KO4UP | 10 | 61 | 2022-07-23 | 2024-07-24 | Available |
| KO4UQ | 10 | 63 | — | — | Available |
| KO4UR | 11 | 57 | 2033-03-02 | — | Active |
| KO4US | 11 | 55 | 2034-09-28 | — | Active (Vanity) |
| KO4UT | 10 | 53 | 2022-03-31 | 2024-04-01 | Available |
| KO4UU | 11 | 57 | 2022-03-31 | 2024-04-01 | Available |
| KO4UV | 10 | 59 | 2012-07-28 | 2014-07-29 | Available |
| KO4UW | 10 | 59 | — | — | Available |
| KO4UX | 10 | 61 | 2022-12-20 | 2024-12-21 | Available |
| KO4UY | 10 | 63 | 2002-03-31 | 2004-04-01 | Available |
| KO4UZ | 10 | 61 | 2012-09-22 | 2014-09-23 | Available |
| KO4VA | 9 | 57 | 2032-06-27 | — | Active |
| KO4VB | 9 | 61 | 2005-06-04 | 2007-06-05 | Available |
| KO4VC | 9 | 63 | 2033-07-18 | — | Active |
| KO4VD | 9 | 59 | 2032-08-20 | — | Active |
| KO4VE | 9 | 53 | 2002-04-07 | 2004-04-08 | Available |
| KO4VF | 9 | 61 | — | — | Available |
| KO4VG | 8 | 61 | 2002-04-07 | 2004-04-08 | Available |
| KO4VH | 9 | 59 | — | — | Available |
| KO4VI | 10 | 55 | — | — | Available |
| KO4VJ | 10 | 65 | 1998-08-28 | 2000-08-29 | Available |
| KO4VK | 9 | 61 | 2033-03-13 | — | Active (Vanity) |
| KO4VL | 9 | 61 | — | — | Available |
| KO4VM | 8 | 59 | 2033-02-28 | — | Active |
| KO4VN | 10 | 57 | 2013-09-20 | 2015-09-21 | Available |
| KO4VO | 9 | 63 | 1998-03-03 | 2000-03-04 | Available |
| KO4VP | 9 | 63 | 2022-04-07 | 2024-04-08 | Available |
| KO4VQ | 9 | 65 | 2022-04-14 | 2024-04-15 | Available |
| KO4VR | 10 | 59 | 2034-01-11 | — | Active |
| KO4VS | 10 | 57 | 2022-04-14 | 2024-04-15 | Available |
| KO4VT | 9 | 55 | 2022-04-14 | 2024-04-15 | Available |
| KO4VU | 10 | 59 | 2022-04-14 | 2024-04-15 | Available |
| KO4VV | 9 | 61 | 2033-03-23 | — | Active |
| KO4VW | 9 | 61 | 2030-10-31 | — | Active (Vanity) |
| KO4VX | 9 | 63 | — | — | Available |
| KO4VY | 9 | 65 | 2020-01-25 | 2022-01-26 | Available |
| KO4VZ | 9 | 63 | 2002-04-21 | 2004-04-22 | Available |
| KO4WA | 9 | 57 | 2022-04-21 | 2024-04-22 | Available |
| KO4WB | 9 | 61 | 2032-04-21 | — | Active |
| KO4WC | 9 | 63 | 2002-04-21 | 2004-04-22 | Available |
| KO4WD | 9 | 59 | 2002-04-26 | 2004-04-27 | Available |
| KO4WE | 9 | 53 | — | — | Available |
| KO4WF | 9 | 61 | 2002-04-21 | 2004-04-22 | Available |
| KO4WG | 8 | 61 | 2012-04-21 | 2014-04-22 | Available |
| KO4WH | 9 | 59 | 2032-04-21 | — | Active |
| KO4WI | 10 | 55 | 2032-07-01 | — | Active |
| KO4WJ | 10 | 65 | — | — | Available |
| KO4WK | 9 | 61 | 2022-04-21 | 2024-04-22 | Available |
| KO4WL | 9 | 61 | — | — | Available |
| KO4WM | 8 | 59 | 2022-04-21 | 2024-04-22 | Available |
| KO4WN | 10 | 57 | — | — | Available |
| KO4WO | 9 | 63 | — | — | Available |
| KO4WP | 9 | 63 | 1999-10-23 | 2001-10-24 | Available |
| KO4WQ | 9 | 65 | 2022-04-21 | 2024-04-22 | Available |
| KO4WR | 10 | 59 | 2002-11-02 | 2004-11-03 | Available |
| KO4WS | 10 | 57 | 2001-04-03 | 2003-04-04 | Available |
| KO4WT | 9 | 55 | 2032-04-28 | — | Active |
| KO4WU | 10 | 59 | 2022-04-28 | 2024-04-29 | Available |
| KO4WV | 9 | 61 | — | — | Available |
| KO4WW | 9 | 61 | — | — | Available |
| KO4WX | 9 | 63 | 2033-04-04 | — | Active |
| KO4WY | 9 | 65 | 2003-01-05 | 2005-01-06 | Available |
| KO4WZ | 9 | 63 | — | — | Available |
| KO4XA | 9 | 59 | — | — | Available |
| KO4XB | 9 | 63 | 2032-07-07 | — | Active |
| KO4XC | 9 | 65 | 2019-11-14 | 2021-11-15 | Available |
| KO4XD | 9 | 61 | — | — | Available |
| KO4XE | 9 | 55 | — | — | Available |
| KO4XF | 9 | 63 | — | — | Available |
| KO4XG | 8 | 63 | 2012-05-14 | 2014-05-15 | Available |
| KO4XH | 9 | 61 | 2032-05-12 | — | Active |
| KO4XI | 10 | 57 | 2012-05-12 | 2014-05-13 | Available |
| KO4XJ | 10 | 67 | 2032-05-12 | — | Active |
| KO4XK | 9 | 63 | 2012-05-12 | 2014-05-13 | Available |
| KO4XL | 9 | 63 | 2033-01-12 | — | Active |
| KO4XM | 8 | 61 | 2003-05-04 | 2005-05-05 | Available |
| KO4XN | 10 | 59 | — | — | Available |
| KO4XO | 9 | 65 | — | — | Available |
| KO4XP | 9 | 65 | 2022-05-12 | 2024-05-13 | Available |
| KO4XQ | 9 | 67 | — | — | Available |
| KO4XR | 10 | 61 | 2024-03-05 | 2026-03-06 | Available |
| KO4XS | 10 | 59 | 2022-05-12 | 2024-05-13 | Available |
| KO4XT | 9 | 57 | 2016-03-18 | 2018-03-19 | Available |
| KO4XU | 10 | 61 | 2012-05-12 | 2014-05-13 | Available |
| KO4XV | 9 | 63 | 2032-05-19 | — | Active |
| KO4XW | 9 | 63 | 2012-06-16 | 2014-06-17 | Available |
| KO4XX | 9 | 65 | 2002-08-11 | 2004-08-12 | Available |
| KO4XY | 9 | 67 | 2022-05-19 | 2024-05-20 | Available |
| KO4XZ | 9 | 65 | — | — | Available |
| KO4YA | 9 | 61 | 2002-05-19 | 2004-05-20 | Available |
| KO4YB | 9 | 65 | 2028-09-05 | — | Active |
| KO4YC | 9 | 67 | 2032-05-19 | — | Active |
| KO4YD | 9 | 63 | 2032-05-19 | — | Active |