District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4ISY | 11 | 53 | 2033-05-26 | — | Active (Vanity) |
| K4ISZ | 11 | 51 | 1998-02-02 | 2000-02-03 | Available |
| K4ITA | 10 | 43 | 2032-08-02 | — | Active (Vanity) |
| K4ITB | 10 | 47 | 2030-03-24 | — | Active (Vanity) |
| K4ITC | 10 | 49 | 2034-07-16 | — | Active (Vanity) |
| K4ITD | 10 | 45 | 2008-01-15 | 2010-01-16 | Available |
| K4ITE | 10 | 39 | 2027-05-23 | — | Active (Vanity) |
| K4ITF | 10 | 47 | 2030-01-22 | — | Active (Vanity) |
| K4ITG | 9 | 47 | — | — | Available |
| K4ITH | 10 | 45 | 2035-07-15 | — | Active (Vanity) |
| K4ITI | 11 | 41 | 2027-12-01 | — | Active (Vanity) |
| K4ITJ | 11 | 51 | — | — | Available |
| K4ITK | 10 | 47 | 2025-06-09 | — | Active (Vanity) |
| K4ITL | 10 | 47 | 2036-03-20 | — | Active (Vanity) |
| K4ITM | 9 | 45 | 2031-11-08 | — | Active (Vanity) |
| K4ITN | 11 | 43 | 2023-06-25 | 2025-06-26 | Available |
| K4ITO | 10 | 49 | 2025-01-26 | — | Active |
| K4ITP | 10 | 49 | 2034-11-04 | — | Active |
| K4ITQ | 10 | 51 | 2035-01-30 | — | Active (Vanity) |
| K4ITR | 11 | 45 | — | — | Available |
| K4ITS | 11 | 43 | — | — | Available |
| K4ITT | 10 | 41 | 2025-03-20 | — | Active |
| K4ITU | 11 | 45 | 2036-10-21 | — | Active (Vanity) |
| K4ITV | 10 | 47 | 2027-11-17 | — | Active |
| K4ITW | 10 | 47 | 2013-08-10 | 2015-08-11 | Available |
| K4ITX | 10 | 49 | 2023-01-19 | 2025-01-20 | Available |
| K4ITY | 10 | 51 | 2007-11-14 | 2009-11-15 | Available |
| K4ITZ | 10 | 49 | 2027-06-13 | — | Active |
| K4IUA | 11 | 47 | 2001-04-09 | 2003-04-10 | Available |
| K4IUB | 11 | 51 | — | — | Available |
| K4IUC | 11 | 53 | 2027-12-24 | — | Active |
| K4IUD | 11 | 49 | 2017-11-19 | 2019-11-20 | Available |
| K4IUE | 11 | 43 | 2013-10-02 | 2015-10-03 | Available |
| K4IUF | 11 | 51 | 2026-05-14 | — | Active |
| K4IUG | 10 | 51 | 2029-02-20 | — | Active (Vanity) |
| K4IUH | 11 | 49 | 2008-01-06 | 2010-01-07 | Available |
| K4IUI | 12 | 45 | — | — | Available |
| K4IUJ | 12 | 55 | 2026-06-03 | — | Active |
| K4IUK | 11 | 51 | 2001-12-03 | 2003-12-04 | Available |
| K4IUL | 11 | 51 | 2009-05-26 | 2011-05-27 | Available |
| K4IUM | 10 | 49 | 2027-12-09 | — | Active |
| K4IUN | 12 | 47 | — | — | Available |
| K4IUO | 11 | 53 | — | — | Available |
| K4IUP | 11 | 53 | — | — | Available |
| K4IUQ | 11 | 55 | — | — | Available |
| K4IUR | 12 | 49 | 2007-07-09 | 2009-07-10 | Available |
| K4IUS | 12 | 47 | 2035-07-24 | — | Active |
| K4IUT | 11 | 45 | — | — | Available |
| K4IUU | 12 | 49 | 2020-06-12 | 2022-06-13 | Available |
| K4IUV | 11 | 51 | 2036-05-03 | — | Active (Vanity) |
| K4IUW | 11 | 51 | — | — | Available |
| K4IUX | 11 | 53 | 2017-03-27 | 2019-03-28 | Available |
| K4IUY | 11 | 55 | — | — | Available |
| K4IUZ | 11 | 53 | 2028-08-04 | — | Active |
| K4IVA | 10 | 49 | — | — | Available |
| K4IVB | 10 | 53 | — | — | Available |
| K4IVC | 10 | 55 | 2001-03-13 | 2003-03-14 | Available |
| K4IVD | 10 | 51 | 2019-01-22 | 2021-01-23 | Available |
| K4IVE | 10 | 45 | 2034-12-30 | — | Active (Vanity) |
| K4IVF | 10 | 53 | 2017-11-25 | 2019-11-26 | Available |
| K4IVG | 9 | 53 | 2018-12-30 | 2020-12-31 | Available |
| K4IVH | 10 | 51 | 2022-03-22 | 2024-03-23 | Available |
| K4IVI | 11 | 47 | 2027-08-18 | — | Active |
| K4IVJ | 11 | 57 | 1998-05-10 | 2000-05-11 | Available |
| K4IVK | 10 | 53 | 2018-12-30 | 2020-12-31 | Available |
| K4IVL | 10 | 53 | — | — | Available |
| K4IVM | 9 | 51 | 2005-12-05 | 2007-12-06 | Available |
| K4IVN | 11 | 49 | 2033-03-25 | — | Active (Vanity) |
| K4IVO | 10 | 55 | 2005-12-04 | 2007-12-05 | Available |
| K4IVP | 10 | 55 | — | — | Available |
| K4IVQ | 10 | 57 | — | — | Available |
| K4IVR | 11 | 51 | — | — | Available |
| K4IVS | 11 | 49 | 2015-01-12 | 2017-01-13 | Available |
| K4IVT | 10 | 47 | — | — | Available |
| K4IVU | 11 | 51 | — | — | Available |
| K4IVV | 10 | 53 | — | — | Available |
| K4IVW | 10 | 53 | 2008-04-28 | 2010-04-29 | Available |
| K4IVX | 10 | 55 | — | — | Available |
| K4IVY | 10 | 57 | 2036-01-31 | — | Active (Vanity) |
| K4IVZ | 10 | 55 | 2008-09-04 | 2010-09-05 | Available |
| K4IWA | 10 | 49 | 2030-08-25 | — | Active (Vanity) |
| K4IWB | 10 | 53 | 2005-11-28 | 2007-11-29 | Available |
| K4IWC | 10 | 55 | — | — | Available |
| K4IWD | 10 | 51 | 2010-06-24 | 2012-06-25 | Available |
| K4IWE | 10 | 45 | — | — | Available |
| K4IWF | 10 | 53 | 2032-04-15 | — | Active (Vanity) |
| K4IWG | 9 | 53 | 2032-03-24 | — | Active |
| K4IWH | 10 | 51 | 2028-06-16 | — | Active |
| K4IWI | 11 | 47 | 2027-12-01 | — | Active (Vanity) |
| K4IWJ | 11 | 57 | 2028-10-27 | — | Active (Vanity) |
| K4IWK | 10 | 53 | 2036-05-30 | — | Active (Vanity) |
| K4IWL | 10 | 53 | 2018-06-26 | 2020-06-27 | Available |
| K4IWM | 9 | 51 | 2022-06-12 | 2024-06-13 | Available |
| K4IWN | 11 | 49 | 2000-11-22 | 2002-11-23 | Available |
| K4IWO | 10 | 55 | 2007-11-21 | 2009-11-22 | Available |
| K4IWP | 10 | 55 | 2027-11-28 | — | Active |
| K4IWQ | 10 | 57 | — | — | Available |
| K4IWR | 11 | 51 | — | — | Available |
| K4IWS | 11 | 49 | — | — | Available |
| K4IWT | 10 | 47 | 2027-12-19 | — | Active |