District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4UHD | 10 | 53 | 2018-12-18 | 2020-12-19 | Available |
| K4UHE | 10 | 47 | — | — | Available |
| K4UHF | 10 | 55 | 2027-07-11 | — | Active (Vanity) |
| K4UHG | 9 | 55 | — | — | Available |
| K4UHH | 10 | 53 | — | — | Available |
| K4UHI | 11 | 49 | — | — | Available |
| K4UHJ | 11 | 59 | — | — | Available |
| K4UHK | 10 | 55 | — | — | Available |
| K4UHL | 10 | 55 | 2028-09-10 | — | Active |
| K4UHM | 9 | 53 | 2023-03-16 | 2025-03-17 | Available |
| K4UHN | 11 | 51 | — | — | Available |
| K4UHO | 10 | 57 | — | — | Available |
| K4UHP | 10 | 57 | — | — | Available |
| K4UHQ | 10 | 59 | 2024-10-14 | 2026-10-15 | Available |
| K4UHR | 11 | 53 | — | — | Available |
| K4UHS | 11 | 51 | — | — | Available |
| K4UHT | 10 | 49 | — | — | Available |
| K4UHU | 11 | 53 | — | — | Available |
| K4UHV | 10 | 55 | 2027-01-28 | — | Active |
| K4UHW | 10 | 55 | 2018-02-26 | 2020-02-27 | Available |
| K4UHX | 10 | 57 | — | — | Available |
| K4UHY | 10 | 59 | 2031-07-09 | — | Active (Vanity) |
| K4UHZ | 10 | 57 | 2036-09-30 | — | Active (Vanity) |
| K4UIA | 11 | 47 | — | — | Available |
| K4UIB | 11 | 51 | — | — | Available |
| K4UIC | 11 | 53 | — | — | Available |
| K4UID | 11 | 49 | — | — | Available |
| K4UIE | 11 | 43 | 2030-08-11 | — | Active (Vanity) |
| K4UIF | 11 | 51 | — | — | Available |
| K4UIG | 10 | 51 | 2024-03-05 | 2026-03-06 | Available |
| K4UIH | 11 | 49 | 2034-03-26 | — | Active |
| K4UII | 12 | 45 | 2032-03-06 | — | Active (Vanity) |
| K4UIJ | 12 | 55 | 1998-06-07 | 2000-06-08 | Available |
| K4UIK | 11 | 51 | — | — | Available |
| K4UIL | 11 | 51 | 2004-11-01 | 2006-11-02 | Available |
| K4UIM | 10 | 49 | — | — | Available |
| K4UIN | 12 | 47 | — | — | Available |
| K4UIO | 11 | 53 | — | — | Available |
| K4UIP | 11 | 53 | — | — | Available |
| K4UIQ | 11 | 55 | — | — | Available |
| K4UIR | 12 | 49 | — | — | Available |
| K4UIS | 12 | 47 | — | — | Available |
| K4UIT | 11 | 45 | — | — | Available |
| K4UIU | 12 | 49 | 2026-07-06 | — | Active (Vanity) |
| K4UIV | 11 | 51 | 2022-03-26 | 2024-03-27 | Available |
| K4UIW | 11 | 51 | — | — | Available |
| K4UIX | 11 | 53 | — | — | Available |
| K4UIY | 11 | 55 | — | — | Available |
| K4UIZ | 11 | 53 | — | — | Available |
| K4UJA | 11 | 57 | 2026-06-18 | — | Active (Vanity) |
| K4UJB | 11 | 61 | 2035-02-14 | — | Active |
| K4UJC | 11 | 63 | — | — | Available |
| K4UJD | 11 | 59 | — | — | Pending Application |
| K4UJE | 11 | 53 | — | — | Available |
| K4UJF | 11 | 61 | — | — | Available |
| K4UJG | 10 | 61 | — | — | Available |
| K4UJH | 11 | 59 | — | — | Available |
| K4UJI | 12 | 55 | 2026-12-13 | — | Active |
| K4UJJ | 12 | 65 | — | — | Available |
| K4UJK | 11 | 61 | — | — | Available |
| K4UJL | 11 | 61 | 2034-04-13 | — | Active (Vanity) |
| K4UJM | 10 | 59 | — | — | Available |
| K4UJN | 12 | 57 | — | — | Available |
| K4UJO | 11 | 63 | — | — | Available |
| K4UJP | 11 | 63 | — | — | Available |
| K4UJQ | 11 | 65 | 2034-07-16 | — | Active |
| K4UJR | 12 | 59 | 2028-01-07 | — | Active (Vanity) |
| K4UJS | 12 | 57 | — | — | Available |
| K4UJT | 11 | 55 | — | — | Available |
| K4UJU | 12 | 59 | — | — | Available |
| K4UJV | 11 | 61 | — | — | Available |
| K4UJW | 11 | 61 | — | — | Available |
| K4UJX | 11 | 63 | — | — | Available |
| K4UJY | 11 | 65 | — | — | Available |
| K4UJZ | 11 | 63 | 1997-09-29 | 1999-09-30 | Available |
| K4UKA | 10 | 53 | — | — | Available |
| K4UKB | 10 | 57 | 2031-06-23 | — | Active (Vanity) |
| K4UKC | 10 | 59 | 2022-11-19 | 2024-11-20 | Available |
| K4UKD | 10 | 55 | — | — | Available |
| K4UKE | 10 | 49 | 2031-09-09 | — | Active (Vanity) |
| K4UKF | 10 | 57 | 2018-12-18 | 2020-12-19 | Available |
| K4UKG | 9 | 57 | — | — | Available |
| K4UKH | 10 | 55 | 2025-10-19 | — | Active (Vanity) |
| K4UKI | 11 | 51 | 2001-11-20 | 2003-11-21 | Available |
| K4UKJ | 11 | 61 | — | — | Available |
| K4UKK | 10 | 57 | — | — | Available |
| K4UKL | 10 | 57 | — | — | Available |
| K4UKM | 9 | 55 | — | — | Available |
| K4UKN | 11 | 53 | — | — | Available |
| K4UKO | 10 | 59 | — | — | Available |
| K4UKP | 10 | 59 | — | — | Available |
| K4UKQ | 10 | 61 | — | — | Available |
| K4UKR | 11 | 55 | — | — | Available |
| K4UKS | 11 | 53 | — | — | Available |
| K4UKT | 10 | 51 | — | — | Available |
| K4UKU | 11 | 55 | — | — | Available |
| K4UKV | 10 | 57 | 2029-03-03 | — | Active (Vanity) |
| K4UKW | 10 | 57 | 2029-07-26 | — | Active (Vanity) |
| K4UKX | 10 | 59 | — | — | Available |
| K4UKY | 10 | 61 | 2034-05-04 | — | Active (Vanity) |