District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4USR | 12 | 51 | 2036-09-02 | — | Active (Vanity) |
| K4USS | 12 | 49 | 2036-03-11 | — | Active (Vanity) |
| K4UST | 11 | 47 | 2029-06-21 | — | Active (Vanity) |
| K4USU | 12 | 51 | — | — | Available |
| K4USV | 11 | 53 | 2029-06-11 | — | Active (Vanity) |
| K4USW | 11 | 53 | 2028-01-24 | — | Active (Vanity) |
| K4USX | 11 | 55 | 2028-01-24 | — | Active (Vanity) |
| K4USY | 11 | 57 | — | — | Available |
| K4USZ | 11 | 55 | — | — | Available |
| K4UTA | 10 | 47 | 2030-11-17 | — | Active (Vanity) |
| K4UTB | 10 | 51 | 2027-01-09 | — | Active |
| K4UTC | 10 | 53 | 2031-01-20 | — | Active (Vanity) |
| K4UTD | 10 | 49 | — | — | Available |
| K4UTE | 10 | 43 | 2026-05-22 | — | Active |
| K4UTF | 10 | 51 | — | — | Available |
| K4UTG | 9 | 51 | — | — | Available |
| K4UTH | 10 | 49 | 2001-01-31 | 2003-02-01 | Available |
| K4UTI | 11 | 45 | 2035-02-22 | — | Active |
| K4UTJ | 11 | 55 | 2027-01-31 | — | Active |
| K4UTK | 10 | 51 | 2028-03-12 | — | Active |
| K4UTL | 10 | 51 | 2026-12-10 | — | Active |
| K4UTM | 9 | 49 | — | — | Available |
| K4UTN | 11 | 47 | 2033-03-25 | — | Active (Vanity) |
| K4UTO | 10 | 53 | — | — | Available |
| K4UTP | 10 | 53 | — | — | Available |
| K4UTQ | 10 | 55 | 2028-03-20 | — | Active (Vanity) |
| K4UTR | 11 | 49 | — | — | Available |
| K4UTS | 11 | 47 | — | — | Available |
| K4UTT | 10 | 45 | 2028-12-04 | — | Active (Vanity) |
| K4UTU | 11 | 49 | 2005-05-31 | 2007-06-01 | Available |
| K4UTV | 10 | 51 | 2032-04-19 | — | Active (Vanity) |
| K4UTW | 10 | 51 | 1998-07-19 | 2000-07-20 | Available |
| K4UTX | 10 | 53 | 2025-02-08 | — | Active |
| K4UTY | 10 | 55 | 2009-05-04 | 2011-05-05 | Available |
| K4UTZ | 10 | 53 | 2034-07-27 | — | Active |
| K4UUA | 11 | 51 | — | — | Available |
| K4UUB | 11 | 55 | 2016-12-15 | 2018-12-16 | Available |
| K4UUC | 11 | 57 | — | — | Available |
| K4UUD | 11 | 53 | — | — | Available |
| K4UUE | 11 | 47 | — | — | Available |
| K4UUF | 11 | 55 | — | — | Available |
| K4UUG | 10 | 55 | 2014-12-31 | 2017-01-01 | Available |
| K4UUH | 11 | 53 | — | — | Available |
| K4UUI | 12 | 49 | — | — | Available |
| K4UUJ | 12 | 59 | 2029-06-26 | — | Active (Vanity) |
| K4UUK | 11 | 55 | 2032-03-15 | — | Active (Vanity) |
| K4UUL | 11 | 55 | — | — | Available |
| K4UUM | 10 | 53 | 2015-02-15 | 2017-02-16 | Available |
| K4UUN | 12 | 51 | — | — | Available |
| K4UUO | 11 | 57 | 2008-04-28 | 2010-04-29 | Available |
| K4UUP | 11 | 57 | — | — | Available |
| K4UUQ | 11 | 59 | 2033-09-21 | — | Active (Vanity) |
| K4UUR | 12 | 53 | 2002-08-04 | 2004-08-05 | Available |
| K4UUS | 12 | 51 | — | — | Available |
| K4UUT | 11 | 49 | — | — | Available |
| K4UUU | 12 | 53 | 2030-01-24 | — | Active (Vanity) |
| K4UUV | 11 | 55 | 2023-08-17 | 2025-08-18 | Available |
| K4UUW | 11 | 55 | 2011-05-07 | 2013-05-08 | Available |
| K4UUX | 11 | 57 | — | — | Available |
| K4UUY | 11 | 59 | — | — | Available |
| K4UUZ | 11 | 57 | — | — | Available |
| K4UVA | 10 | 53 | 2036-08-30 | — | Active (Vanity) |
| K4UVB | 10 | 57 | 2024-03-05 | 2026-03-06 | Available |
| K4UVC | 10 | 59 | 2024-03-15 | 2026-03-16 | Available |
| K4UVD | 10 | 55 | — | — | Available |
| K4UVE | 10 | 49 | — | — | Available |
| K4UVF | 10 | 57 | 2024-05-31 | 2026-06-01 | Available |
| K4UVG | 9 | 57 | — | — | Available |
| K4UVH | 10 | 55 | 2014-09-18 | 2016-09-19 | Available |
| K4UVI | 11 | 51 | 2036-12-27 | — | Active (Vanity) |
| K4UVJ | 11 | 61 | — | — | Available |
| K4UVK | 10 | 57 | — | — | Available |
| K4UVL | 10 | 57 | — | — | Available |
| K4UVM | 9 | 55 | 2008-08-27 | 2010-08-28 | Available |
| K4UVN | 11 | 53 | — | — | Available |
| K4UVO | 10 | 59 | — | — | Available |
| K4UVP | 10 | 59 | — | — | Available |
| K4UVQ | 10 | 61 | — | — | Available |
| K4UVR | 11 | 55 | 2001-02-12 | 2003-02-13 | Available |
| K4UVS | 11 | 53 | — | — | Available |
| K4UVT | 10 | 51 | 2003-07-25 | 2005-07-26 | Available |
| K4UVU | 11 | 55 | 2034-12-27 | — | Active (Vanity) |
| K4UVV | 10 | 57 | 2036-06-01 | — | Active |
| K4UVW | 10 | 57 | — | — | Available |
| K4UVX | 10 | 59 | 2029-04-16 | — | Active (Vanity) |
| K4UVY | 10 | 61 | — | — | Available |
| K4UVZ | 10 | 59 | — | — | Available |
| K4UWA | 10 | 53 | 2024-08-05 | 2026-08-06 | Available |
| K4UWB | 10 | 57 | — | — | Available |
| K4UWC | 10 | 59 | 2027-11-07 | — | Active (Vanity) |
| K4UWD | 10 | 55 | — | — | Available |
| K4UWE | 10 | 49 | — | — | Available |
| K4UWF | 10 | 57 | 2009-02-10 | 2011-02-11 | Available |
| K4UWG | 9 | 57 | — | — | Available |
| K4UWH | 10 | 55 | 2032-06-14 | — | Active (Vanity) |
| K4UWI | 11 | 51 | — | — | Available |
| K4UWJ | 11 | 61 | 2006-12-17 | 2008-12-18 | Available |
| K4UWK | 10 | 57 | — | — | Available |
| K4UWL | 10 | 57 | — | — | Available |
| K4UWM | 9 | 55 | 2021-02-19 | 2023-02-20 | Available |