District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4OMY | 8 | 63 | — | — | Available |
| K4OMZ | 8 | 61 | 2029-04-09 | — | Active |
| K4ONA | 10 | 53 | 2030-09-29 | — | Active (Vanity) |
| K4ONB | 10 | 57 | 2036-03-25 | — | Active (Vanity) |
| K4ONC | 10 | 59 | 2027-04-25 | — | Active (Vanity) |
| K4OND | 10 | 55 | 2036-10-23 | — | Active (Vanity) |
| K4ONE | 10 | 49 | 2036-08-16 | — | Active (Vanity) |
| K4ONF | 10 | 57 | 2016-04-04 | 2018-04-05 | Available |
| K4ONG | 9 | 57 | — | — | Available |
| K4ONH | 10 | 55 | 2015-07-27 | 2017-07-28 | Available |
| K4ONI | 11 | 51 | 2034-01-18 | — | Active |
| K4ONJ | 11 | 61 | 2017-07-11 | 2019-07-12 | Available |
| K4ONK | 10 | 57 | — | — | Available |
| K4ONL | 10 | 57 | 2008-02-27 | 2010-02-28 | Available |
| K4ONM | 9 | 55 | — | — | Available |
| K4ONN | 11 | 53 | — | — | Available |
| K4ONO | 10 | 59 | 2031-05-21 | — | Active (Vanity) |
| K4ONP | 10 | 59 | 2027-07-31 | — | Active |
| K4ONQ | 10 | 61 | — | — | Available |
| K4ONR | 11 | 55 | — | — | Available |
| K4ONS | 11 | 53 | 2022-09-11 | 2024-09-12 | Available |
| K4ONT | 10 | 51 | — | — | Available |
| K4ONU | 11 | 55 | — | — | Available |
| K4ONV | 10 | 57 | — | — | Available |
| K4ONW | 10 | 57 | — | — | Available |
| K4ONX | 10 | 59 | — | — | Available |
| K4ONY | 10 | 61 | 2022-10-13 | 2024-10-14 | Available |
| K4ONZ | 10 | 59 | — | — | Available |
| K4OOA | 9 | 59 | — | — | Available |
| K4OOB | 9 | 63 | 2029-01-07 | — | Active (Vanity) |
| K4OOC | 9 | 65 | 2011-12-17 | 2013-12-18 | Available |
| K4OOD | 9 | 61 | 2034-01-25 | — | Active (Vanity) |
| K4OOE | 9 | 55 | 2024-12-31 | — | Active |
| K4OOF | 9 | 63 | — | — | Available |
| K4OOG | 8 | 63 | — | — | Available |
| K4OOH | 9 | 61 | 2028-05-15 | — | Active (Vanity) |
| K4OOI | 10 | 57 | 2036-04-12 | — | Active (Vanity) |
| K4OOJ | 10 | 67 | — | — | Available |
| K4OOK | 9 | 63 | 2036-07-21 | — | Active (Vanity) |
| K4OOL | 9 | 63 | 2027-05-23 | — | Active |
| K4OOM | 8 | 61 | 2035-06-09 | — | Active (Vanity) |
| K4OON | 10 | 59 | — | — | Available |
| K4OOO | 9 | 65 | 2033-03-29 | — | Active (Vanity) |
| K4OOP | 9 | 65 | — | — | Available |
| K4OOQ | 9 | 67 | — | — | Available |
| K4OOR | 10 | 61 | — | — | Available |
| K4OOS | 10 | 59 | — | — | Available |
| K4OOT | 9 | 57 | 2035-07-01 | — | Active (Vanity) |
| K4OOU | 10 | 61 | — | — | Available |
| K4OOV | 9 | 63 | 2033-05-04 | — | Active |
| K4OOW | 9 | 63 | 2032-11-11 | — | Active (Vanity) |
| K4OOX | 9 | 65 | — | — | Available |
| K4OOY | 9 | 67 | — | — | Available |
| K4OOZ | 9 | 65 | 2031-08-06 | — | Active (Vanity) |
| K4OPA | 9 | 59 | 2031-02-23 | — | Active (Vanity) |
| K4OPB | 9 | 63 | — | — | Available |
| K4OPC | 9 | 65 | — | — | Available |
| K4OPD | 9 | 61 | 2014-07-02 | 2016-07-03 | Available |
| K4OPE | 9 | 55 | 2026-08-21 | 2028-08-22 | Canceled (grace period) |
| K4OPF | 9 | 63 | 2031-05-28 | — | Active (Vanity) |
| K4OPG | 8 | 63 | 2036-03-29 | — | Active (Vanity) |
| K4OPH | 9 | 61 | — | — | Available |
| K4OPI | 10 | 57 | — | — | Available |
| K4OPJ | 10 | 67 | — | — | Available |
| K4OPK | 9 | 63 | 2004-05-24 | 2006-05-25 | Available |
| K4OPL | 9 | 63 | 2020-06-23 | 2022-06-24 | Available |
| K4OPM | 8 | 61 | 2033-11-16 | — | Active (Vanity) |
| K4OPN | 10 | 59 | 2018-01-06 | 2020-01-07 | Available |
| K4OPO | 9 | 65 | — | — | Available |
| K4OPP | 9 | 65 | 2014-07-15 | 2016-07-16 | Available |
| K4OPQ | 9 | 67 | — | — | Available |
| K4OPR | 10 | 61 | 2032-03-04 | — | Active (Vanity) |
| K4OPS | 10 | 59 | 2029-08-20 | — | Active (Vanity) |
| K4OPT | 9 | 57 | 2032-08-09 | — | Active (Vanity) |
| K4OPU | 10 | 61 | — | — | Available |
| K4OPV | 9 | 63 | — | — | Available |
| K4OPW | 9 | 63 | — | — | Available |
| K4OPX | 9 | 65 | 2028-06-29 | — | Active (Vanity) |
| K4OPY | 9 | 67 | — | — | Available |
| K4OPZ | 9 | 65 | 2027-03-25 | — | Active (Vanity) |
| K4OQA | 9 | 61 | 2014-05-24 | 2016-05-25 | Available |
| K4OQB | 9 | 65 | 2026-09-09 | — | Active (Vanity) |
| K4OQC | 9 | 67 | — | — | Available |
| K4OQD | 9 | 63 | — | — | Available |
| K4OQE | 9 | 57 | — | — | Available |
| K4OQF | 9 | 65 | 2006-12-18 | 2008-12-19 | Available |
| K4OQG | 8 | 65 | — | — | Available |
| K4OQH | 9 | 63 | — | — | Available |
| K4OQI | 10 | 59 | — | — | Available |
| K4OQJ | 10 | 69 | — | — | Available |
| K4OQK | 9 | 65 | — | — | Available |
| K4OQL | 9 | 65 | — | — | Available |
| K4OQM | 8 | 63 | 1997-12-29 | 1999-12-30 | Available |
| K4OQN | 10 | 61 | 2006-06-04 | 2008-06-05 | Available |
| K4OQO | 9 | 67 | 2017-07-31 | 2019-08-01 | Available |
| K4OQP | 9 | 67 | 2017-07-31 | 2019-08-01 | Available |
| K4OQQ | 9 | 69 | — | — | Available |
| K4OQR | 10 | 63 | — | — | Available |
| K4OQS | 10 | 61 | — | — | Available |
| K4OQT | 9 | 59 | — | — | Available |