District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4UDH | 10 | 53 | — | — | Available |
| K4UDI | 11 | 49 | 2013-03-11 | 2015-03-12 | Available |
| K4UDJ | 11 | 59 | — | — | Available |
| K4UDK | 10 | 55 | — | — | Available |
| K4UDL | 10 | 55 | — | — | Available |
| K4UDM | 9 | 53 | — | — | Available |
| K4UDN | 11 | 51 | — | — | Available |
| K4UDO | 10 | 57 | — | — | Available |
| K4UDP | 10 | 57 | 2022-10-05 | 2024-10-06 | Available |
| K4UDQ | 10 | 59 | 2036-03-16 | — | Active (Vanity) |
| K4UDR | 11 | 53 | 2028-05-01 | — | Active |
| K4UDS | 11 | 51 | — | — | Available |
| K4UDT | 10 | 49 | 2031-10-19 | — | Active (Vanity) |
| K4UDU | 11 | 53 | — | — | Available |
| K4UDV | 10 | 55 | — | — | Available |
| K4UDW | 10 | 55 | 2017-11-12 | 2019-11-13 | Available |
| K4UDX | 10 | 57 | — | — | Available |
| K4UDY | 10 | 59 | 2013-06-08 | 2015-06-09 | Available |
| K4UDZ | 10 | 57 | — | — | Available |
| K4UEA | 10 | 45 | 2034-04-11 | — | Active (Vanity) |
| K4UEB | 10 | 49 | — | — | Available |
| K4UEC | 10 | 51 | 2003-10-05 | 2005-10-06 | Available |
| K4UED | 10 | 47 | 2006-06-20 | 2008-06-21 | Available |
| K4UEE | 10 | 41 | 2036-04-11 | — | Active (Vanity) |
| K4UEF | 10 | 49 | — | — | Available |
| K4UEG | 9 | 49 | 2004-10-21 | 2006-10-22 | Available |
| K4UEH | 10 | 47 | — | — | Available |
| K4UEI | 11 | 43 | — | — | Available |
| K4UEJ | 11 | 53 | — | — | Available |
| K4UEK | 10 | 49 | 2031-05-04 | — | Active (Vanity) |
| K4UEL | 10 | 49 | — | — | Available |
| K4UEM | 9 | 47 | 2024-03-05 | 2026-03-06 | Available |
| K4UEN | 11 | 45 | — | — | Available |
| K4UEO | 10 | 51 | 2036-03-17 | — | Active (Vanity) |
| K4UEP | 10 | 51 | — | — | Available |
| K4UEQ | 10 | 53 | 2016-05-08 | 2018-05-09 | Available |
| K4UER | 11 | 47 | — | — | Available |
| K4UES | 11 | 45 | 2028-07-21 | — | Active |
| K4UET | 10 | 43 | — | — | Available |
| K4UEU | 11 | 47 | — | — | Available |
| K4UEV | 10 | 49 | — | — | Available |
| K4UEW | 10 | 49 | — | — | Available |
| K4UEX | 10 | 51 | — | — | Available |
| K4UEY | 10 | 53 | — | — | Available |
| K4UEZ | 10 | 51 | 2032-05-11 | — | Active (Vanity) |
| K4UFA | 10 | 53 | — | — | Available |
| K4UFB | 10 | 57 | 2036-06-07 | — | Active (Vanity) |
| K4UFC | 10 | 59 | — | — | Available |
| K4UFD | 10 | 55 | 2014-03-08 | 2025-06-20 | Available |
| K4UFE | 10 | 49 | 2029-12-20 | — | Active (Vanity) |
| K4UFF | 10 | 57 | — | — | Available |
| K4UFG | 9 | 57 | 2026-02-22 | — | Active |
| K4UFH | 10 | 55 | — | — | Available |
| K4UFI | 11 | 51 | — | — | Available |
| K4UFJ | 11 | 61 | — | — | Available |
| K4UFK | 10 | 57 | — | — | Available |
| K4UFL | 10 | 57 | 2029-10-12 | — | Active (Vanity) |
| K4UFM | 9 | 55 | 2006-03-28 | 2008-03-29 | Available |
| K4UFN | 11 | 53 | 2035-04-04 | — | Active |
| K4UFO | 10 | 59 | 2034-07-15 | — | Active |
| K4UFP | 10 | 59 | — | — | Available |
| K4UFQ | 10 | 61 | — | — | Available |
| K4UFR | 11 | 55 | 2014-08-11 | 2016-08-12 | Available |
| K4UFS | 11 | 53 | 2026-11-04 | — | Active (Vanity) |
| K4UFT | 10 | 51 | 2028-02-13 | — | Active |
| K4UFU | 11 | 55 | — | — | Available |
| K4UFV | 10 | 57 | 2025-04-20 | — | Active |
| K4UFW | 10 | 57 | — | — | Available |
| K4UFX | 10 | 59 | — | — | Available |
| K4UFY | 10 | 61 | — | — | Available |
| K4UFZ | 10 | 59 | — | — | Available |
| K4UGA | 9 | 53 | 2028-06-25 | — | Active (Vanity) |
| K4UGB | 9 | 57 | — | — | Available |
| K4UGC | 9 | 59 | — | — | Available |
| K4UGD | 9 | 55 | 2006-11-04 | 2008-11-05 | Available |
| K4UGE | 9 | 49 | 2016-12-04 | 2018-12-05 | Available |
| K4UGF | 9 | 57 | 2008-01-09 | 2010-01-10 | Available |
| K4UGG | 8 | 57 | 2031-05-04 | — | Active (Vanity) |
| K4UGH | 9 | 55 | — | — | Available |
| K4UGI | 10 | 51 | — | — | Available |
| K4UGJ | 10 | 61 | — | — | Available |
| K4UGK | 9 | 57 | 2028-06-24 | — | Active |
| K4UGL | 9 | 57 | — | — | Available |
| K4UGM | 8 | 55 | — | — | Available |
| K4UGN | 10 | 53 | 2014-12-20 | 2016-12-21 | Available |
| K4UGO | 9 | 59 | 2034-03-02 | — | Active (Vanity) |
| K4UGP | 9 | 59 | — | — | Available |
| K4UGQ | 9 | 61 | — | — | Available |
| K4UGR | 10 | 55 | 2026-02-07 | 2028-02-08 | Canceled (grace period) |
| K4UGS | 10 | 53 | — | — | Available |
| K4UGT | 9 | 51 | — | — | Available |
| K4UGU | 10 | 55 | — | — | Available |
| K4UGV | 9 | 57 | — | — | Available |
| K4UGW | 9 | 57 | — | — | Available |
| K4UGX | 9 | 59 | — | — | Available |
| K4UGY | 9 | 61 | — | — | Available |
| K4UGZ | 9 | 59 | — | — | Available |
| K4UHA | 10 | 51 | — | — | Available |
| K4UHB | 10 | 55 | — | — | Available |
| K4UHC | 10 | 57 | 2035-12-05 | — | Active |