District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4CFS | 10 | 57 | 2007-04-17 | 2009-04-18 | Available |
| K4CFT | 9 | 55 | 2034-02-06 | — | Active (Vanity) |
| K4CFU | 10 | 59 | 2033-02-20 | — | Active (Vanity) |
| K4CFV | 9 | 61 | 2028-03-17 | — | Active |
| K4CFW | 9 | 61 | 2031-07-01 | — | Active (Vanity) |
| K4CFX | 9 | 63 | — | — | Available |
| K4CFY | 9 | 65 | — | — | Available |
| K4CFZ | 9 | 63 | 2028-05-04 | — | Active (Vanity) |
| K4CGA | 8 | 57 | 2035-02-20 | — | Active (Vanity) |
| K4CGB | 8 | 61 | 2035-11-17 | — | Active (Vanity) |
| K4CGC | 8 | 63 | 2035-04-26 | — | Active (Vanity) |
| K4CGD | 8 | 59 | — | — | Available |
| K4CGE | 8 | 53 | — | — | Available |
| K4CGF | 8 | 61 | 2031-06-04 | — | Active (Vanity) |
| K4CGG | 7 | 61 | — | — | Available |
| K4CGH | 8 | 59 | 2029-04-16 | — | Active (Vanity) |
| K4CGI | 9 | 55 | 2027-03-27 | — | Active (Vanity) |
| K4CGJ | 9 | 65 | 2019-11-23 | 2021-11-24 | Available |
| K4CGK | 8 | 61 | 2029-03-25 | — | Active (Vanity) |
| K4CGL | 8 | 61 | — | — | Available |
| K4CGM | 7 | 59 | 2032-10-14 | — | Active (Vanity) |
| K4CGN | 9 | 57 | 2027-10-11 | — | Active (Vanity) |
| K4CGO | 8 | 63 | — | — | Available |
| K4CGP | 8 | 63 | 2024-07-15 | 2026-07-16 | Available |
| K4CGQ | 8 | 65 | — | — | Available |
| K4CGR | 9 | 59 | 2027-04-21 | — | Active (Vanity) |
| K4CGS | 9 | 57 | 2035-04-15 | — | Active (Vanity) |
| K4CGT | 8 | 55 | 2030-06-09 | — | Active (Vanity) |
| K4CGU | 9 | 59 | — | — | Available |
| K4CGV | 8 | 61 | — | — | Available |
| K4CGW | 8 | 61 | 2030-10-31 | — | Active (Vanity) |
| K4CGX | 8 | 63 | 2018-02-26 | 2020-02-27 | Available |
| K4CGY | 8 | 65 | 2034-04-05 | — | Active |
| K4CGZ | 8 | 63 | 2014-07-07 | 2016-07-08 | Available |
| K4CHA | 9 | 55 | 2030-06-23 | — | Active (Vanity) |
| K4CHB | 9 | 59 | 2032-08-28 | — | Active (Vanity) |
| K4CHC | 9 | 61 | 2029-06-13 | — | Active (Vanity) |
| K4CHD | 9 | 57 | 2031-08-26 | — | Active (Vanity) |
| K4CHE | 9 | 51 | 2034-05-24 | — | Active |
| K4CHF | 9 | 59 | 2036-04-01 | — | Active (Vanity) |
| K4CHG | 8 | 59 | — | — | Available |
| K4CHH | 9 | 57 | 1997-09-22 | 1999-09-23 | Available |
| K4CHI | 10 | 53 | 2021-10-19 | 2023-10-20 | Available |
| K4CHJ | 10 | 63 | — | — | Available |
| K4CHK | 9 | 59 | 2036-12-30 | — | Active (Vanity) |
| K4CHL | 9 | 59 | 2034-03-05 | — | Active (Vanity) |
| K4CHM | 8 | 57 | 2032-05-25 | — | Active (Vanity) |
| K4CHN | 10 | 55 | 2030-08-28 | — | Active (Vanity) |
| K4CHO | 9 | 61 | 2015-04-25 | 2017-04-26 | Available |
| K4CHP | 9 | 61 | 2032-09-27 | — | Active (Vanity) |
| K4CHQ | 9 | 63 | — | — | Available |
| K4CHR | 10 | 57 | 2030-04-04 | — | Active (Vanity) |
| K4CHS | 10 | 55 | 2027-01-23 | — | Active |
| K4CHT | 9 | 53 | 2034-05-07 | — | Active (Vanity) |
| K4CHU | 10 | 57 | 2036-06-18 | — | Active (Vanity) |
| K4CHV | 9 | 59 | — | — | Available |
| K4CHW | 9 | 59 | 2027-03-31 | — | Active (Vanity) |
| K4CHX | 9 | 61 | 2035-02-14 | — | Active (Vanity) |
| K4CHY | 9 | 63 | 2028-12-04 | — | Active (Vanity) |
| K4CHZ | 9 | 61 | — | — | Available |
| K4CIA | 10 | 51 | 2033-11-23 | — | Active |
| K4CIB | 10 | 55 | — | — | Available |
| K4CIC | 10 | 57 | 2026-10-24 | — | Active |
| K4CID | 10 | 53 | 2027-08-24 | — | Active (Vanity) |
| K4CIE | 10 | 47 | 2029-03-05 | — | Active (Vanity) |
| K4CIF | 10 | 55 | 2030-03-31 | — | Active (Vanity) |
| K4CIG | 9 | 55 | — | — | Available |
| K4CIH | 10 | 53 | 2030-07-14 | — | Active (Vanity) |
| K4CII | 11 | 49 | 2035-03-01 | — | Active (Vanity) |
| K4CIJ | 11 | 59 | 2031-04-09 | — | Active (Vanity) |
| K4CIK | 10 | 55 | 2021-12-02 | 2023-12-03 | Available |
| K4CIL | 10 | 55 | — | — | Available |
| K4CIM | 9 | 53 | — | — | Available |
| K4CIN | 11 | 51 | 2036-03-03 | — | Active (Vanity) |
| K4CIO | 10 | 57 | 2033-11-07 | — | Active (Vanity) |
| K4CIP | 10 | 57 | 2029-11-26 | — | Active (Vanity) |
| K4CIQ | 10 | 59 | 2034-12-09 | — | Active (Vanity) |
| K4CIR | 11 | 53 | 2030-08-04 | — | Active (Vanity) |
| K4CIS | 11 | 51 | 2023-03-08 | 2025-03-09 | Available |
| K4CIT | 10 | 49 | 2017-06-23 | 2019-06-24 | Available |
| K4CIU | 11 | 53 | 2027-02-12 | — | Active (Vanity) |
| K4CIV | 10 | 55 | — | — | Available |
| K4CIW | 10 | 55 | 2035-07-24 | — | Active |
| K4CIX | 10 | 57 | — | — | Available |
| K4CIY | 10 | 59 | 2007-11-18 | 2009-11-19 | Available |
| K4CIZ | 10 | 57 | — | — | Available |
| K4CJA | 10 | 61 | 2031-07-03 | — | Active (Vanity) |
| K4CJB | 10 | 65 | 2034-05-31 | — | Active (Vanity) |
| K4CJC | 10 | 67 | 2027-07-04 | — | Active (Vanity) |
| K4CJD | 10 | 63 | — | — | Available |
| K4CJE | 10 | 57 | 2035-06-21 | — | Active (Vanity) |
| K4CJF | 10 | 65 | — | — | Available |
| K4CJG | 9 | 65 | 2023-03-05 | 2025-03-06 | Available |
| K4CJH | 10 | 63 | 2029-05-31 | — | Active (Vanity) |
| K4CJI | 11 | 59 | — | — | Available |
| K4CJJ | 11 | 69 | — | — | Available |
| K4CJK | 10 | 65 | 2030-09-11 | — | Active (Vanity) |
| K4CJL | 10 | 65 | 2027-12-08 | — | Active (Vanity) |
| K4CJM | 9 | 63 | 2029-02-03 | — | Active (Vanity) |
| K4CJN | 11 | 61 | 2010-04-03 | 2012-04-04 | Available |