District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4OJC | 10 | 67 | 2001-08-10 | 2003-08-11 | Available |
| K4OJD | 10 | 63 | 2027-08-13 | — | Active |
| K4OJE | 10 | 57 | 2017-10-14 | 2019-10-15 | Available |
| K4OJF | 10 | 65 | 2030-03-10 | — | Active (Vanity) |
| K4OJG | 9 | 65 | — | — | Available |
| K4OJH | 10 | 63 | — | — | Available |
| K4OJI | 11 | 59 | 2025-08-07 | — | Active (Vanity) |
| K4OJJ | 11 | 69 | 2007-04-25 | 2009-04-26 | Available |
| K4OJK | 10 | 65 | 2017-02-26 | 2019-02-27 | Available |
| K4OJL | 10 | 65 | — | — | Available |
| K4OJM | 9 | 63 | 2032-07-26 | — | Active (Vanity) |
| K4OJN | 11 | 61 | — | — | Available |
| K4OJO | 10 | 67 | — | — | Available |
| K4OJP | 10 | 67 | 2017-06-09 | 2019-06-10 | Available |
| K4OJQ | 10 | 69 | 2004-03-08 | 2006-03-09 | Available |
| K4OJR | 11 | 63 | 2033-10-14 | — | Active (Vanity) |
| K4OJS | 11 | 61 | — | — | Available |
| K4OJT | 10 | 59 | 2034-04-20 | — | Active (Vanity) |
| K4OJU | 11 | 63 | 2028-03-29 | — | Active |
| K4OJV | 10 | 65 | 2003-10-05 | 2005-10-06 | Available |
| K4OJW | 10 | 65 | 2034-08-02 | — | Active (Vanity) |
| K4OJX | 10 | 67 | — | — | Available |
| K4OJY | 10 | 69 | — | — | Available |
| K4OJZ | 10 | 67 | — | — | Available |
| K4OKA | 9 | 57 | 2021-03-30 | 2023-03-31 | Available |
| K4OKB | 9 | 61 | — | — | Available |
| K4OKC | 9 | 63 | 2031-06-04 | — | Active (Vanity) |
| K4OKD | 9 | 59 | — | — | Available |
| K4OKE | 9 | 53 | 2032-12-24 | — | Active (Vanity) |
| K4OKF | 9 | 61 | 1997-09-29 | 1999-09-30 | Available |
| K4OKG | 8 | 61 | — | — | Available |
| K4OKH | 9 | 59 | — | — | Available |
| K4OKI | 10 | 55 | 2025-07-15 | 2027-07-16 | Canceled (grace period) |
| K4OKJ | 10 | 65 | — | — | Available |
| K4OKK | 9 | 61 | 2036-07-28 | — | Active (Vanity) |
| K4OKL | 9 | 61 | — | — | Available |
| K4OKM | 8 | 59 | — | — | Available |
| K4OKN | 10 | 57 | — | — | Available |
| K4OKO | 9 | 63 | 2028-03-29 | — | Active (Vanity) |
| K4OKP | 9 | 63 | 1998-05-10 | 2000-05-11 | Available |
| K4OKQ | 9 | 65 | — | — | Available |
| K4OKR | 10 | 59 | 2004-12-12 | 2006-12-13 | Available |
| K4OKS | 10 | 57 | — | — | Available |
| K4OKT | 9 | 55 | — | — | Available |
| K4OKU | 10 | 59 | — | — | Available |
| K4OKV | 9 | 61 | 2024-12-08 | — | Active |
| K4OKW | 9 | 61 | 1998-01-19 | 2000-01-20 | Available |
| K4OKX | 9 | 63 | — | — | Available |
| K4OKY | 9 | 65 | 2015-10-20 | 2017-10-21 | Available |
| K4OKZ | 9 | 63 | — | — | Available |
| K4OLA | 9 | 57 | 2029-07-16 | — | Active (Vanity) |
| K4OLB | 9 | 61 | 2031-02-09 | — | Active (Vanity) |
| K4OLC | 9 | 63 | 2028-12-22 | — | Active |
| K4OLD | 9 | 59 | 2036-07-26 | — | Active (Vanity) |
| K4OLE | 9 | 53 | 2033-05-31 | — | Active (Vanity) |
| K4OLF | 9 | 61 | 2007-02-17 | 2009-02-18 | Available |
| K4OLG | 8 | 61 | 2036-08-25 | — | Active (Vanity) |
| K4OLH | 9 | 59 | 2031-04-27 | — | Active (Vanity) |
| K4OLI | 10 | 55 | — | — | Available |
| K4OLJ | 10 | 65 | — | — | Available |
| K4OLK | 9 | 61 | — | — | Available |
| K4OLL | 9 | 61 | — | — | Available |
| K4OLM | 8 | 59 | 2007-02-07 | 2009-02-08 | Available |
| K4OLN | 10 | 57 | — | — | Available |
| K4OLO | 9 | 63 | — | — | Available |
| K4OLP | 9 | 63 | 2010-07-18 | 2012-07-19 | Available |
| K4OLQ | 9 | 65 | — | — | Available |
| K4OLR | 10 | 59 | 2034-12-17 | — | Active (Vanity) |
| K4OLS | 10 | 57 | 2033-09-16 | — | Active (Vanity) |
| K4OLT | 9 | 55 | 2032-08-18 | — | Active (Vanity) |
| K4OLU | 10 | 59 | 2007-09-13 | 2009-09-14 | Available |
| K4OLV | 9 | 61 | — | — | Available |
| K4OLW | 9 | 61 | 2034-08-02 | — | Active (Vanity) |
| K4OLX | 9 | 63 | 2027-12-09 | — | Active |
| K4OLY | 9 | 65 | 2035-04-22 | — | Active (Vanity) |
| K4OLZ | 9 | 63 | — | — | Available |
| K4OMA | 8 | 55 | 2034-09-13 | — | Active (Vanity) |
| K4OMB | 8 | 59 | — | — | Available |
| K4OMC | 8 | 61 | 2032-10-25 | — | Active (Vanity) |
| K4OMD | 8 | 57 | 2028-11-20 | — | Active (Vanity) |
| K4OME | 8 | 51 | — | — | Available |
| K4OMF | 8 | 59 | — | — | Available |
| K4OMG | 7 | 59 | 2031-05-06 | — | Active (Vanity) |
| K4OMH | 8 | 57 | — | — | Available |
| K4OMI | 9 | 53 | — | — | Available |
| K4OMJ | 9 | 63 | — | — | Available |
| K4OMK | 8 | 59 | — | — | Available |
| K4OML | 8 | 59 | 2029-07-22 | — | Active |
| K4OMM | 7 | 57 | 2036-05-24 | — | Active (Vanity) |
| K4OMN | 9 | 55 | 2035-03-21 | — | Active (Vanity) |
| K4OMO | 8 | 61 | — | — | Available |
| K4OMP | 8 | 61 | 2034-10-11 | — | Active (Vanity) |
| K4OMQ | 8 | 63 | — | — | Available |
| K4OMR | 9 | 57 | 2035-01-14 | — | Active (Vanity) |
| K4OMS | 9 | 55 | 2029-03-24 | — | Active (Vanity) |
| K4OMT | 8 | 53 | — | — | Available |
| K4OMU | 9 | 57 | — | — | Available |
| K4OMV | 8 | 59 | — | — | Available |
| K4OMW | 8 | 59 | — | — | Available |
| K4OMX | 8 | 61 | 2028-06-08 | — | Active (Vanity) |