District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4UOV | 10 | 59 | — | — | Available |
| K4UOW | 10 | 59 | — | — | Available |
| K4UOX | 10 | 61 | 2023-01-12 | 2025-01-13 | Available |
| K4UOY | 10 | 63 | — | — | Available |
| K4UOZ | 10 | 61 | 2027-09-12 | — | Active |
| K4UPA | 10 | 55 | — | — | Available |
| K4UPB | 10 | 59 | — | — | Available |
| K4UPC | 10 | 61 | — | — | Available |
| K4UPD | 10 | 57 | — | — | Available |
| K4UPE | 10 | 51 | 2024-04-04 | 2026-04-05 | Available |
| K4UPF | 10 | 59 | — | — | Available |
| K4UPG | 9 | 59 | 2029-01-06 | — | Active (Vanity) |
| K4UPH | 10 | 57 | — | — | Available |
| K4UPI | 11 | 53 | 2034-06-14 | — | Active (Vanity) |
| K4UPJ | 11 | 63 | — | — | Available |
| K4UPK | 10 | 59 | 2014-07-14 | 2016-07-15 | Available |
| K4UPL | 10 | 59 | — | — | Available |
| K4UPM | 9 | 57 | — | — | Available |
| K4UPN | 11 | 55 | — | — | Available |
| K4UPO | 10 | 61 | — | — | Available |
| K4UPP | 10 | 61 | 2002-03-19 | 2004-03-20 | Available |
| K4UPQ | 10 | 63 | — | — | Available |
| K4UPR | 11 | 57 | — | — | Available |
| K4UPS | 11 | 55 | 2026-06-18 | — | Active (Vanity) |
| K4UPT | 10 | 53 | 2034-03-14 | — | Active (Vanity) |
| K4UPU | 11 | 57 | — | — | Available |
| K4UPV | 10 | 59 | 2030-04-22 | — | Active (Vanity) |
| K4UPW | 10 | 59 | — | — | Available |
| K4UPX | 10 | 61 | 2032-01-25 | — | Active (Vanity) |
| K4UPY | 10 | 63 | — | — | Available |
| K4UPZ | 10 | 61 | — | — | Available |
| K4UQA | 10 | 57 | — | — | Available |
| K4UQB | 10 | 61 | — | — | Available |
| K4UQC | 10 | 63 | 2031-06-30 | — | Active |
| K4UQD | 10 | 59 | — | — | Available |
| K4UQE | 10 | 53 | 2036-01-06 | — | Active (Vanity) |
| K4UQF | 10 | 61 | 2016-03-30 | 2018-03-31 | Available |
| K4UQG | 9 | 61 | — | — | Available |
| K4UQH | 10 | 59 | — | — | Available |
| K4UQI | 11 | 55 | — | — | Available |
| K4UQJ | 11 | 65 | — | — | Available |
| K4UQK | 10 | 61 | — | — | Available |
| K4UQL | 10 | 61 | — | — | Available |
| K4UQM | 9 | 59 | — | — | Available |
| K4UQN | 11 | 57 | 2028-09-22 | — | Active |
| K4UQO | 10 | 63 | — | — | Available |
| K4UQP | 10 | 63 | 2003-02-09 | 2005-02-10 | Available |
| K4UQQ | 10 | 65 | — | — | Available |
| K4UQR | 11 | 59 | 2026-02-23 | — | Active |
| K4UQS | 11 | 57 | — | — | Available |
| K4UQT | 10 | 55 | 2028-02-26 | — | Active (Vanity) |
| K4UQU | 11 | 59 | — | — | Available |
| K4UQV | 10 | 61 | — | — | Available |
| K4UQW | 10 | 61 | — | — | Available |
| K4UQX | 10 | 63 | — | — | Available |
| K4UQY | 10 | 65 | — | — | Available |
| K4UQZ | 10 | 63 | — | — | Available |
| K4URA | 11 | 51 | — | — | Available |
| K4URB | 11 | 55 | — | — | Available |
| K4URC | 11 | 57 | — | — | Available |
| K4URD | 11 | 53 | — | — | Available |
| K4URE | 11 | 47 | 2023-03-09 | 2025-03-10 | Available |
| K4URF | 11 | 55 | 2009-03-25 | 2011-03-26 | Available |
| K4URG | 10 | 55 | — | — | Available |
| K4URH | 11 | 53 | — | — | Available |
| K4URI | 12 | 49 | — | — | Available |
| K4URJ | 12 | 59 | — | — | Available |
| K4URK | 11 | 55 | — | — | Available |
| K4URL | 11 | 55 | — | — | Available |
| K4URM | 10 | 53 | 2032-01-14 | — | Active (Vanity) |
| K4URN | 12 | 51 | — | — | Available |
| K4URO | 11 | 57 | 2034-01-30 | — | Active (Vanity) |
| K4URP | 11 | 57 | — | — | Available |
| K4URQ | 11 | 59 | — | — | Available |
| K4URR | 12 | 53 | — | — | Available |
| K4URS | 12 | 51 | — | — | Available |
| K4URT | 11 | 49 | 2032-05-24 | — | Active (Vanity) |
| K4URU | 12 | 53 | — | — | Available |
| K4URV | 11 | 55 | — | — | Available |
| K4URW | 11 | 55 | 2036-07-26 | — | Active (Vanity) |
| K4URX | 11 | 57 | — | — | Available |
| K4URY | 11 | 59 | — | — | Available |
| K4URZ | 11 | 57 | 2029-02-20 | — | Active (Vanity) |
| K4USA | 11 | 49 | 2036-11-04 | — | Active (Vanity) |
| K4USB | 11 | 53 | 2028-01-07 | — | Active (Vanity) |
| K4USC | 11 | 55 | 2028-04-22 | — | Active (Vanity) |
| K4USD | 11 | 51 | 2026-07-11 | — | Active (Vanity) |
| K4USE | 11 | 45 | 2017-10-01 | 2019-10-02 | Available |
| K4USF | 11 | 53 | 2029-12-29 | — | Active (Vanity) |
| K4USG | 10 | 53 | — | — | Available |
| K4USH | 11 | 51 | 2028-03-27 | — | Active (Vanity) |
| K4USI | 12 | 47 | 2030-02-15 | — | Active (Vanity) |
| K4USJ | 12 | 57 | — | — | Available |
| K4USK | 11 | 53 | 1998-03-01 | 2000-03-02 | Available |
| K4USL | 11 | 53 | — | — | Available |
| K4USM | 10 | 51 | 2029-01-01 | — | Active (Vanity) |
| K4USN | 12 | 49 | 2030-05-19 | — | Active (Vanity) |
| K4USO | 11 | 55 | 2025-01-13 | — | Active |
| K4USP | 11 | 55 | — | — | Available |
| K4USQ | 11 | 57 | — | — | Available |