District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4SUR | 12 | 51 | — | — | Available |
| K4SUS | 12 | 49 | 2028-10-20 | — | Active (Vanity) |
| K4SUT | 11 | 47 | — | — | Available |
| K4SUU | 12 | 51 | — | — | Available |
| K4SUV | 11 | 53 | 2023-02-24 | 2025-02-25 | Available |
| K4SUW | 11 | 53 | — | — | Available |
| K4SUX | 11 | 55 | — | — | Available |
| K4SUY | 11 | 57 | 2015-10-27 | 2017-10-28 | Available |
| K4SUZ | 11 | 55 | 2030-06-08 | — | Active (Vanity) |
| K4SVA | 10 | 51 | 2010-08-06 | 2012-08-07 | Available |
| K4SVB | 10 | 55 | 2033-07-25 | — | Active (Vanity) |
| K4SVC | 10 | 57 | 2026-09-10 | — | Active |
| K4SVD | 10 | 53 | 2029-10-16 | — | Active (Vanity) |
| K4SVE | 10 | 47 | 2014-05-13 | 2016-05-14 | Available |
| K4SVF | 10 | 55 | — | — | Available |
| K4SVG | 9 | 55 | — | — | Available |
| K4SVH | 10 | 53 | 2009-08-11 | 2011-08-12 | Available |
| K4SVI | 11 | 49 | 2029-06-16 | — | Active (Vanity) |
| K4SVJ | 11 | 59 | — | — | Available |
| K4SVK | 10 | 55 | 2030-01-24 | — | Active (Vanity) |
| K4SVL | 10 | 55 | 2029-06-23 | — | Active (Vanity) |
| K4SVM | 9 | 53 | — | — | Available |
| K4SVN | 11 | 51 | 2027-11-03 | — | Active (Vanity) |
| K4SVO | 10 | 57 | — | — | Available |
| K4SVP | 10 | 57 | — | — | Available |
| K4SVQ | 10 | 59 | — | — | Available |
| K4SVR | 11 | 53 | 2036-09-26 | — | Active (Vanity) |
| K4SVS | 11 | 51 | 2028-01-23 | — | Active |
| K4SVT | 10 | 49 | 2028-06-20 | — | Active (Vanity) |
| K4SVU | 11 | 53 | — | — | Available |
| K4SVV | 10 | 55 | 2016-08-07 | 2018-08-08 | Available |
| K4SVW | 10 | 55 | 1998-03-15 | 2000-03-16 | Available |
| K4SVX | 10 | 57 | 2035-04-25 | — | Active (Vanity) |
| K4SVY | 10 | 59 | 2010-10-24 | 2012-10-25 | Available |
| K4SVZ | 10 | 57 | — | — | Available |
| K4SWA | 10 | 51 | 2030-11-06 | — | Active (Vanity) |
| K4SWB | 10 | 55 | 2029-02-24 | — | Active (Vanity) |
| K4SWC | 10 | 57 | 2027-08-25 | — | Active |
| K4SWD | 10 | 53 | 2035-06-17 | — | Active (Vanity) |
| K4SWE | 10 | 47 | 2030-09-12 | — | Active (Vanity) |
| K4SWF | 10 | 55 | 2004-04-17 | 2006-04-18 | Available |
| K4SWG | 9 | 55 | 2032-02-07 | — | Active (Vanity) |
| K4SWH | 10 | 53 | 2036-02-18 | — | Active (Vanity) |
| K4SWI | 11 | 49 | 2035-12-11 | — | Active (Vanity) |
| K4SWJ | 11 | 59 | 2026-11-04 | — | Active |
| K4SWK | 10 | 55 | 2031-02-01 | — | Active (Vanity) |
| K4SWL | 10 | 55 | 2030-08-17 | — | Active (Vanity) |
| K4SWM | 9 | 53 | 2033-09-16 | — | Active (Vanity) |
| K4SWN | 11 | 51 | 2036-09-04 | — | Active (Vanity) |
| K4SWO | 10 | 57 | 2032-06-12 | — | Active (Vanity) |
| K4SWP | 10 | 57 | 2024-06-03 | 2026-06-04 | Available |
| K4SWQ | 10 | 59 | — | — | Available |
| K4SWR | 11 | 53 | 2029-04-01 | — | Active (Vanity) |
| K4SWS | 11 | 51 | 2031-07-20 | — | Active (Vanity) |
| K4SWT | 10 | 49 | 2035-03-19 | — | Active (Vanity) |
| K4SWU | 11 | 53 | 2019-02-26 | 2021-02-27 | Available |
| K4SWV | 10 | 55 | 2034-10-11 | — | Active (Vanity) |
| K4SWW | 10 | 55 | 2027-04-07 | — | Active (Vanity) |
| K4SWX | 10 | 57 | 2036-06-17 | — | Active (Vanity) |
| K4SWY | 10 | 59 | — | — | Available |
| K4SWZ | 10 | 57 | 2033-03-22 | — | Active (Vanity) |
| K4SXA | 10 | 53 | — | — | Available |
| K4SXB | 10 | 57 | — | — | Available |
| K4SXC | 10 | 59 | — | — | Available |
| K4SXD | 10 | 55 | — | — | Available |
| K4SXE | 10 | 49 | — | — | Available |
| K4SXF | 10 | 57 | 2002-11-17 | 2004-11-18 | Available |
| K4SXG | 9 | 57 | — | — | Available |
| K4SXH | 10 | 55 | — | — | Available |
| K4SXI | 11 | 51 | — | — | Available |
| K4SXJ | 11 | 61 | — | — | Available |
| K4SXK | 10 | 57 | — | — | Available |
| K4SXL | 10 | 57 | — | — | Available |
| K4SXM | 9 | 55 | — | — | Available |
| K4SXN | 11 | 53 | — | — | Available |
| K4SXO | 10 | 59 | — | — | Available |
| K4SXP | 10 | 59 | — | — | Available |
| K4SXQ | 10 | 61 | 1997-12-22 | 1999-12-23 | Available |
| K4SXR | 11 | 55 | — | — | Available |
| K4SXS | 11 | 53 | 2024-07-31 | 2026-08-01 | Available |
| K4SXT | 10 | 51 | 2026-03-01 | — | Active |
| K4SXU | 11 | 55 | 2029-04-09 | — | Active (Vanity) |
| K4SXV | 10 | 57 | — | — | Available |
| K4SXW | 10 | 57 | — | — | Available |
| K4SXX | 10 | 59 | 2023-02-22 | 2025-02-23 | Available |
| K4SXY | 10 | 61 | 2012-06-04 | 2014-06-05 | Available |
| K4SXZ | 10 | 59 | — | — | Available |
| K4SYA | 10 | 55 | — | — | Available |
| K4SYB | 10 | 59 | — | — | Available |
| K4SYC | 10 | 61 | — | — | Available |
| K4SYD | 10 | 57 | 2035-12-12 | — | Active (Vanity) |
| K4SYE | 10 | 51 | — | — | Available |
| K4SYF | 10 | 59 | 2030-03-20 | — | Active (Vanity) |
| K4SYG | 9 | 59 | — | — | Available |
| K4SYH | 10 | 57 | — | — | Available |
| K4SYI | 11 | 53 | — | — | Available |
| K4SYJ | 11 | 63 | — | — | Available |
| K4SYK | 10 | 59 | — | — | Available |
| K4SYL | 10 | 59 | 2022-10-18 | 2024-10-19 | Available |
| K4SYM | 9 | 57 | 2005-03-15 | 2007-03-16 | Available |