District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4OBK | 9 | 61 | — | — | Available |
| K4OBL | 9 | 61 | 2027-12-27 | — | Active (Vanity) |
| K4OBM | 8 | 59 | — | — | Available |
| K4OBN | 10 | 57 | — | — | Available |
| K4OBO | 9 | 63 | — | — | Available |
| K4OBP | 9 | 63 | 2013-08-19 | 2015-08-20 | Available |
| K4OBQ | 9 | 65 | — | — | Available |
| K4OBR | 10 | 59 | 2031-03-16 | — | Active (Vanity) |
| K4OBS | 10 | 57 | 2026-06-19 | — | Active |
| K4OBT | 9 | 55 | 2035-01-05 | — | Active |
| K4OBU | 10 | 59 | — | — | Available |
| K4OBV | 9 | 61 | — | — | Available |
| K4OBW | 9 | 61 | — | — | Available |
| K4OBX | 9 | 63 | 2029-10-20 | — | Active (Vanity) |
| K4OBY | 9 | 65 | 2029-04-16 | — | Active (Vanity) |
| K4OBZ | 9 | 63 | 2032-02-15 | — | Active (Vanity) |
| K4OCA | 9 | 59 | 2035-03-29 | — | Active (Vanity) |
| K4OCB | 9 | 63 | — | — | Available |
| K4OCC | 9 | 65 | — | — | Available |
| K4OCD | 9 | 61 | 2036-02-17 | — | Active (Vanity) |
| K4OCE | 9 | 55 | 2028-06-05 | — | Active |
| K4OCF | 9 | 63 | 2022-08-06 | 2024-08-07 | Available |
| K4OCG | 8 | 63 | — | — | Available |
| K4OCH | 9 | 61 | — | — | Available |
| K4OCI | 10 | 57 | 2031-10-01 | — | Active |
| K4OCJ | 10 | 67 | — | — | Available |
| K4OCK | 9 | 63 | — | — | Available |
| K4OCL | 9 | 63 | 2024-06-29 | 2026-06-30 | Available |
| K4OCM | 8 | 61 | — | — | Available |
| K4OCN | 10 | 59 | 2030-05-12 | — | Active (Vanity) |
| K4OCO | 9 | 65 | 2034-12-31 | — | Active (Vanity) |
| K4OCP | 9 | 65 | — | — | Available |
| K4OCQ | 9 | 67 | — | — | Available |
| K4OCR | 10 | 61 | — | — | Available |
| K4OCS | 10 | 59 | 2035-10-27 | — | Active (Vanity) |
| K4OCT | 9 | 57 | 2023-09-06 | 2025-09-07 | Available |
| K4OCU | 10 | 61 | — | — | Available |
| K4OCV | 9 | 63 | 2008-12-03 | 2010-12-04 | Available |
| K4OCW | 9 | 63 | — | — | Available |
| K4OCX | 9 | 65 | — | — | Available |
| K4OCY | 9 | 67 | 2035-08-14 | — | Active (Vanity) |
| K4OCZ | 9 | 65 | — | — | Available |
| K4ODA | 9 | 55 | 2031-05-11 | — | Active (Vanity) |
| K4ODB | 9 | 59 | 2034-11-16 | — | Active |
| K4ODC | 9 | 61 | 2026-12-24 | — | Active (Vanity) |
| K4ODD | 9 | 57 | 2031-08-28 | — | Active (Vanity) |
| K4ODE | 9 | 51 | 2023-07-26 | 2025-07-27 | Available |
| K4ODF | 9 | 59 | — | — | Available |
| K4ODG | 8 | 59 | — | — | Available |
| K4ODH | 9 | 57 | — | — | Available |
| K4ODI | 10 | 53 | 2022-07-14 | 2024-07-15 | Available |
| K4ODJ | 10 | 63 | — | — | Available |
| K4ODK | 9 | 59 | — | — | Available |
| K4ODL | 9 | 59 | 2028-05-06 | — | Active |
| K4ODM | 8 | 57 | — | — | Available |
| K4ODN | 10 | 55 | 2034-07-09 | — | Active (Vanity) |
| K4ODO | 9 | 61 | 2025-06-01 | — | Active |
| K4ODP | 9 | 61 | 2010-02-27 | 2012-02-28 | Available |
| K4ODQ | 9 | 63 | — | — | Available |
| K4ODR | 10 | 57 | — | — | Available |
| K4ODS | 10 | 55 | 2035-05-11 | — | Active |
| K4ODT | 9 | 53 | 2031-05-07 | — | Active (Vanity) |
| K4ODU | 10 | 57 | 2031-12-21 | — | Active (Vanity) |
| K4ODV | 9 | 59 | — | — | Available |
| K4ODW | 9 | 59 | 2015-11-07 | 2017-11-08 | Available |
| K4ODX | 9 | 61 | 2016-06-18 | 2018-06-19 | Available |
| K4ODY | 9 | 63 | — | — | Available |
| K4ODZ | 9 | 61 | 2033-06-06 | — | Active (Vanity) |
| K4OEA | 9 | 49 | — | — | Available |
| K4OEB | 9 | 53 | 2031-04-03 | — | Active (Vanity) |
| K4OEC | 9 | 55 | 2022-04-26 | 2024-04-27 | Available |
| K4OED | 9 | 51 | — | — | Available |
| K4OEE | 9 | 45 | — | — | Available |
| K4OEF | 9 | 53 | — | — | Available |
| K4OEG | 8 | 53 | — | — | Available |
| K4OEH | 9 | 51 | — | — | Available |
| K4OEI | 10 | 47 | — | — | Available |
| K4OEJ | 10 | 57 | 2027-11-10 | — | Active |
| K4OEK | 9 | 53 | 2026-11-15 | — | Active (Vanity) |
| K4OEL | 9 | 53 | 2028-02-24 | — | Active |
| K4OEM | 8 | 51 | 2029-06-16 | — | Active (Vanity) |
| K4OEN | 10 | 49 | 2034-02-13 | — | Active (Vanity) |
| K4OEO | 9 | 55 | — | — | Available |
| K4OEP | 9 | 55 | 1998-02-02 | 2000-02-03 | Available |
| K4OEQ | 9 | 57 | — | — | Available |
| K4OER | 10 | 51 | — | — | Available |
| K4OES | 10 | 49 | 2028-05-11 | — | Active (Vanity) |
| K4OET | 9 | 47 | — | — | Available |
| K4OEU | 10 | 51 | — | — | Available |
| K4OEV | 9 | 53 | — | — | Available |
| K4OEW | 9 | 53 | — | — | Available |
| K4OEX | 9 | 55 | — | — | Available |
| K4OEY | 9 | 57 | 2017-09-02 | 2019-09-03 | Available |
| K4OEZ | 9 | 55 | 2004-08-10 | 2006-08-11 | Available |
| K4OFA | 9 | 57 | — | — | Available |
| K4OFB | 9 | 61 | — | — | Available |
| K4OFC | 9 | 63 | 2030-05-30 | — | Active (Vanity) |
| K4OFD | 9 | 59 | 2035-04-18 | — | Active (Vanity) |
| K4OFE | 9 | 53 | — | — | Available |
| K4OFF | 9 | 61 | 2024-12-14 | — | Active (Vanity) |