District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4RTS | 11 | 47 | 2028-01-08 | — | Active (Vanity) |
| K4RTT | 10 | 45 | 2028-05-11 | — | Active (Vanity) |
| K4RTU | 11 | 49 | 2028-06-18 | — | Active (Vanity) |
| K4RTV | 10 | 51 | 2036-09-16 | — | Active (Vanity) |
| K4RTW | 10 | 51 | 2028-05-30 | — | Active (Vanity) |
| K4RTX | 10 | 53 | 2034-05-29 | — | Active (Vanity) |
| K4RTY | 10 | 55 | 2023-08-31 | 2025-09-01 | Available |
| K4RTZ | 10 | 53 | 2032-08-16 | — | Active (Vanity) |
| K4RUA | 11 | 51 | — | — | Available |
| K4RUB | 11 | 55 | 2035-10-14 | — | Active (Vanity) |
| K4RUC | 11 | 57 | 2028-04-22 | — | Active |
| K4RUD | 11 | 53 | — | — | Available |
| K4RUE | 11 | 47 | 2027-07-24 | — | Active (Vanity) |
| K4RUF | 11 | 55 | 2030-02-25 | — | Active (Vanity) |
| K4RUG | 10 | 55 | — | — | Available |
| K4RUH | 11 | 53 | — | — | Available |
| K4RUI | 12 | 49 | 2007-05-27 | 2009-05-28 | Available |
| K4RUJ | 12 | 59 | — | — | Available |
| K4RUK | 11 | 55 | 2029-02-20 | — | Active (Vanity) |
| K4RUL | 11 | 55 | 2032-02-26 | — | Active (Vanity) |
| K4RUM | 10 | 53 | 2034-02-03 | — | Active (Vanity) |
| K4RUN | 12 | 51 | 2031-12-23 | — | Active (Vanity) |
| K4RUO | 11 | 57 | 1998-09-23 | 2000-09-24 | Available |
| K4RUP | 11 | 57 | 2029-06-22 | — | Active (Vanity) |
| K4RUQ | 11 | 59 | — | — | Available |
| K4RUR | 12 | 53 | 2026-01-27 | 2028-01-28 | Canceled (grace period) |
| K4RUS | 12 | 51 | 2028-10-05 | — | Active (Vanity) |
| K4RUT | 11 | 49 | 2034-07-06 | — | Active (Vanity) |
| K4RUU | 12 | 53 | — | — | Available |
| K4RUV | 11 | 55 | — | — | Available |
| K4RUW | 11 | 55 | 2007-06-16 | 2009-06-17 | Available |
| K4RUX | 11 | 57 | 2028-07-07 | — | Active (Vanity) |
| K4RUY | 11 | 59 | — | — | Available |
| K4RUZ | 11 | 57 | — | — | Available |
| K4RVA | 10 | 53 | 2023-06-25 | — | Active (Vanity) |
| K4RVB | 10 | 57 | 2028-08-13 | — | Active |
| K4RVC | 10 | 59 | 2036-02-21 | — | Active (Vanity) |
| K4RVD | 10 | 55 | 2007-08-07 | 2009-08-08 | Available |
| K4RVE | 10 | 49 | 2035-08-12 | — | Active (Vanity) |
| K4RVF | 10 | 57 | — | — | Available |
| K4RVG | 9 | 57 | 2017-11-04 | 2019-11-05 | Available |
| K4RVH | 10 | 55 | 2032-04-03 | — | Active (Vanity) |
| K4RVI | 11 | 51 | — | — | Available |
| K4RVJ | 11 | 61 | 2027-09-22 | — | Active |
| K4RVK | 10 | 57 | — | — | Available |
| K4RVL | 10 | 57 | — | — | Available |
| K4RVM | 9 | 55 | 2034-10-09 | — | Active (Vanity) |
| K4RVN | 11 | 53 | 2035-11-28 | — | Active |
| K4RVO | 10 | 59 | — | — | Available |
| K4RVP | 10 | 59 | — | — | Available |
| K4RVQ | 10 | 61 | — | — | Available |
| K4RVR | 11 | 55 | 2031-11-23 | — | Active (Vanity) |
| K4RVS | 11 | 53 | 2018-03-04 | 2020-03-05 | Available |
| K4RVT | 10 | 51 | — | — | Available |
| K4RVU | 11 | 55 | — | — | Available |
| K4RVV | 10 | 57 | — | — | Available |
| K4RVW | 10 | 57 | 2027-01-09 | — | Active |
| K4RVX | 10 | 59 | — | — | Available |
| K4RVY | 10 | 61 | 2028-01-13 | — | Active (Vanity) |
| K4RVZ | 10 | 59 | 2013-05-21 | 2015-05-22 | Available |
| K4RWA | 10 | 53 | 2026-02-09 | — | Active |
| K4RWB | 10 | 57 | 2027-02-12 | — | Active (Vanity) |
| K4RWC | 10 | 59 | 2027-11-13 | — | Active |
| K4RWD | 10 | 55 | 2031-03-30 | — | Active (Vanity) |
| K4RWE | 10 | 49 | 2035-10-06 | — | Active (Vanity) |
| K4RWF | 10 | 57 | 2013-05-11 | 2015-05-12 | Available |
| K4RWG | 9 | 57 | 2026-09-13 | — | Active |
| K4RWH | 10 | 55 | 2034-07-20 | — | Active (Vanity) |
| K4RWI | 11 | 51 | 2008-08-25 | 2010-08-26 | Available |
| K4RWJ | 11 | 61 | — | — | Available |
| K4RWK | 10 | 57 | 2023-06-27 | 2025-06-28 | Available |
| K4RWL | 10 | 57 | 2026-01-07 | — | Active (Vanity) |
| K4RWM | 9 | 55 | 2035-07-05 | — | Active (Vanity) |
| K4RWN | 11 | 53 | 2030-07-17 | — | Active |
| K4RWO | 10 | 59 | — | — | Available |
| K4RWP | 10 | 59 | 2034-08-06 | — | Active |
| K4RWQ | 10 | 61 | — | — | Available |
| K4RWR | 11 | 55 | 2032-02-05 | — | Active (Vanity) |
| K4RWS | 11 | 53 | 2027-05-20 | — | Active (Vanity) |
| K4RWT | 10 | 51 | 2022-06-29 | 2024-06-30 | Available |
| K4RWU | 11 | 55 | 1998-08-17 | 2000-08-18 | Available |
| K4RWV | 10 | 57 | 2014-09-07 | 2016-09-08 | Available |
| K4RWW | 10 | 57 | 2029-02-11 | — | Active (Vanity) |
| K4RWX | 10 | 59 | — | — | Available |
| K4RWY | 10 | 61 | — | — | Available |
| K4RWZ | 10 | 59 | — | — | Available |
| K4RXA | 10 | 55 | — | — | Available |
| K4RXB | 10 | 59 | 2006-08-28 | 2008-08-29 | Available |
| K4RXC | 10 | 61 | 2027-12-02 | — | Active (Vanity) |
| K4RXD | 10 | 57 | 2023-06-25 | 2025-06-26 | Available |
| K4RXE | 10 | 51 | 2017-06-04 | 2019-06-05 | Available |
| K4RXF | 10 | 59 | — | — | Available |
| K4RXG | 9 | 59 | — | — | Available |
| K4RXH | 10 | 57 | 2029-05-31 | — | Active (Vanity) |
| K4RXI | 11 | 53 | 2028-05-02 | — | Active (Vanity) |
| K4RXJ | 11 | 63 | — | — | Available |
| K4RXK | 10 | 59 | — | — | Available |
| K4RXL | 10 | 59 | 2031-03-23 | — | Active (Vanity) |
| K4RXM | 9 | 57 | 2022-09-17 | 2024-09-18 | Available |
| K4RXN | 11 | 55 | — | — | Available |