District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4CRG | 9 | 59 | 2034-07-26 | — | Active (Vanity) |
| K4CRH | 10 | 57 | 2028-05-12 | — | Active (Vanity) |
| K4CRI | 11 | 53 | 2025-04-12 | — | Active |
| K4CRJ | 11 | 63 | 2027-03-07 | — | Active (Vanity) |
| K4CRK | 10 | 59 | 2029-12-12 | — | Active (Vanity) |
| K4CRL | 10 | 59 | 2026-08-29 | — | Active (Vanity) |
| K4CRM | 9 | 57 | 2034-07-13 | — | Active (Vanity) |
| K4CRN | 11 | 55 | 2029-09-07 | — | Active (Vanity) |
| K4CRO | 10 | 61 | 2036-08-07 | — | Active |
| K4CRP | 10 | 61 | 2004-09-07 | 2006-09-08 | Available |
| K4CRQ | 10 | 63 | 2006-10-11 | 2008-10-12 | Available |
| K4CRR | 11 | 57 | 2026-02-15 | — | Active |
| K4CRS | 11 | 55 | 2031-12-24 | — | Active (Vanity) |
| K4CRT | 10 | 53 | 2026-07-09 | — | Active (Vanity) |
| K4CRU | 11 | 57 | 2027-11-21 | — | Active (Vanity) |
| K4CRV | 10 | 59 | — | — | Available |
| K4CRW | 10 | 59 | 2035-09-30 | — | Active (Vanity) |
| K4CRX | 10 | 61 | 2027-05-05 | — | Active (Vanity) |
| K4CRY | 10 | 63 | 2017-03-28 | 2019-03-29 | Available |
| K4CRZ | 10 | 61 | 2034-04-09 | — | Active (Vanity) |
| K4CSA | 10 | 53 | 2031-03-12 | — | Active (Vanity) |
| K4CSB | 10 | 57 | 2027-03-24 | — | Active |
| K4CSC | 10 | 59 | 2034-09-17 | — | Active (Vanity) |
| K4CSD | 10 | 55 | 2032-11-15 | — | Active (Vanity) |
| K4CSE | 10 | 49 | 2019-06-26 | 2021-06-27 | Available |
| K4CSF | 10 | 57 | — | — | Available |
| K4CSG | 9 | 57 | 2034-02-04 | — | Active (Vanity) |
| K4CSH | 10 | 55 | 2022-10-16 | 2024-10-17 | Available |
| K4CSI | 11 | 51 | 2027-12-30 | — | Active (Vanity) |
| K4CSJ | 11 | 61 | 2017-02-26 | 2019-02-27 | Available |
| K4CSK | 10 | 57 | 2035-08-02 | — | Active (Vanity) |
| K4CSL | 10 | 57 | 2028-09-23 | — | Active (Vanity) |
| K4CSM | 9 | 55 | 2024-08-15 | 2026-08-16 | Available |
| K4CSN | 11 | 53 | 2023-04-29 | 2025-04-30 | Available |
| K4CSO | 10 | 59 | 2030-06-17 | — | Active (Vanity) |
| K4CSP | 10 | 59 | 2033-12-29 | — | Active (Vanity) |
| K4CSQ | 10 | 61 | — | — | Available |
| K4CSR | 11 | 55 | 2024-05-02 | 2026-05-03 | Available |
| K4CSS | 11 | 53 | 2036-01-10 | — | Active (Vanity) |
| K4CST | 10 | 51 | 2036-09-08 | — | Active (Vanity) |
| K4CSU | 11 | 55 | 2018-11-03 | 2020-11-04 | Available |
| K4CSV | 10 | 57 | 2008-04-08 | 2010-04-09 | Available |
| K4CSW | 10 | 57 | 2031-07-20 | — | Active (Vanity) |
| K4CSX | 10 | 59 | 2030-05-30 | — | Active (Vanity) |
| K4CSY | 10 | 61 | — | — | Available |
| K4CSZ | 10 | 59 | 2033-11-28 | — | Active (Vanity) |
| K4CTA | 9 | 51 | 2033-04-08 | — | Active (Vanity) |
| K4CTB | 9 | 55 | 2030-06-29 | — | Active (Vanity) |
| K4CTC | 9 | 57 | 2036-06-21 | — | Active (Vanity) |
| K4CTD | 9 | 53 | 2027-09-26 | — | Active (Vanity) |
| K4CTE | 9 | 47 | 2034-02-21 | — | Active (Vanity) |
| K4CTF | 9 | 55 | 2028-05-15 | — | Active (Vanity) |
| K4CTG | 8 | 55 | 2027-10-24 | — | Active |
| K4CTH | 9 | 53 | 2016-03-30 | 2018-03-31 | Available |
| K4CTI | 10 | 49 | 2030-02-25 | — | Active (Vanity) |
| K4CTJ | 10 | 59 | 2026-08-02 | — | Active (Vanity) |
| K4CTK | 9 | 55 | 2031-11-29 | — | Active (Vanity) |
| K4CTL | 9 | 55 | 2032-08-10 | — | Active (Vanity) |
| K4CTM | 8 | 53 | 2030-06-25 | — | Active (Vanity) |
| K4CTN | 10 | 51 | 2028-11-07 | — | Active (Vanity) |
| K4CTO | 9 | 57 | 2029-02-28 | — | Active (Vanity) |
| K4CTP | 9 | 57 | — | — | Available |
| K4CTQ | 9 | 59 | 2028-05-09 | — | Active (Vanity) |
| K4CTR | 10 | 53 | 2027-03-27 | — | Active (Vanity) |
| K4CTS | 10 | 51 | 2034-11-23 | — | Active (Vanity) |
| K4CTT | 9 | 49 | 2036-04-22 | — | Active |
| K4CTU | 10 | 53 | 2025-10-27 | — | Active (Vanity) |
| K4CTV | 9 | 55 | 2031-04-22 | — | Active (Vanity) |
| K4CTW | 9 | 55 | 2029-06-23 | — | Active (Vanity) |
| K4CTX | 9 | 57 | 2032-05-27 | — | Active (Vanity) |
| K4CTY | 9 | 59 | 2011-10-05 | 2013-10-06 | Available |
| K4CTZ | 9 | 57 | — | — | Available |
| K4CUA | 10 | 55 | 2031-03-19 | — | Active (Vanity) |
| K4CUB | 10 | 59 | 2033-05-16 | — | Active (Vanity) |
| K4CUC | 10 | 61 | — | — | Available |
| K4CUD | 10 | 57 | — | — | Available |
| K4CUE | 10 | 51 | 2033-12-07 | — | Active |
| K4CUF | 10 | 59 | 2005-07-11 | 2007-07-12 | Available |
| K4CUG | 9 | 59 | — | — | Available |
| K4CUH | 10 | 57 | — | — | Available |
| K4CUI | 11 | 53 | 2005-02-19 | 2007-02-20 | Available |
| K4CUJ | 11 | 63 | — | — | Available |
| K4CUK | 10 | 59 | — | — | Available |
| K4CUL | 10 | 59 | 2029-06-28 | — | Active (Vanity) |
| K4CUM | 9 | 57 | — | — | Available |
| K4CUN | 11 | 55 | — | — | Available |
| K4CUO | 10 | 61 | 2010-09-19 | 2012-09-20 | Available |
| K4CUP | 10 | 61 | 2036-08-16 | — | Active (Vanity) |
| K4CUQ | 10 | 63 | 1998-08-23 | 2000-08-24 | Available |
| K4CUR | 11 | 57 | 2029-06-16 | — | Active (Vanity) |
| K4CUS | 11 | 55 | — | — | Available |
| K4CUT | 10 | 53 | — | — | Available |
| K4CUU | 11 | 57 | 2023-09-28 | 2025-09-29 | Available |
| K4CUV | 10 | 59 | 2034-12-12 | — | Active (Vanity) |
| K4CUW | 10 | 59 | 2015-02-15 | 2017-02-16 | Available |
| K4CUX | 10 | 61 | 2015-12-15 | 2017-12-16 | Available |
| K4CUY | 10 | 63 | — | — | Available |
| K4CUZ | 10 | 61 | 2032-09-24 | — | Active (Vanity) |
| K4CVA | 9 | 57 | 2034-12-23 | — | Active (Vanity) |
| K4CVB | 9 | 61 | — | — | Available |