District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4RXO | 10 | 61 | 2026-08-13 | — | Active |
| K4RXP | 10 | 61 | 2004-09-08 | 2006-09-09 | Available |
| K4RXQ | 10 | 63 | — | — | Available |
| K4RXR | 11 | 57 | 2029-04-03 | — | Active (Vanity) |
| K4RXS | 11 | 55 | 2033-09-09 | — | Active (Vanity) |
| K4RXT | 10 | 53 | 2032-12-10 | — | Active (Vanity) |
| K4RXU | 11 | 57 | — | — | Available |
| K4RXV | 10 | 59 | — | — | Available |
| K4RXW | 10 | 59 | — | — | Available |
| K4RXX | 10 | 61 | 2034-04-08 | — | Active (Vanity) |
| K4RXY | 10 | 63 | 2029-06-02 | — | Active (Vanity) |
| K4RXZ | 10 | 61 | — | — | Available |
| K4RYA | 10 | 57 | — | — | Available |
| K4RYB | 10 | 61 | — | — | Available |
| K4RYC | 10 | 63 | 2025-03-07 | — | Active (Vanity) |
| K4RYD | 10 | 59 | — | — | Available |
| K4RYE | 10 | 53 | 2034-08-06 | — | Active (Vanity) |
| K4RYF | 10 | 61 | — | — | Available |
| K4RYG | 9 | 61 | — | — | Available |
| K4RYH | 10 | 59 | 2008-06-24 | 2025-06-20 | Available |
| K4RYI | 11 | 55 | 2034-10-01 | — | Active |
| K4RYJ | 11 | 65 | 2007-01-09 | 2009-01-10 | Available |
| K4RYK | 10 | 61 | 2027-02-21 | — | Active |
| K4RYL | 10 | 61 | 2033-09-19 | — | Active (Vanity) |
| K4RYM | 9 | 59 | 2005-05-18 | 2007-05-19 | Available |
| K4RYN | 11 | 57 | 2027-12-12 | — | Active (Vanity) |
| K4RYO | 10 | 63 | — | — | Available |
| K4RYP | 10 | 63 | — | — | Available |
| K4RYQ | 10 | 65 | 2015-06-13 | 2017-06-14 | Available |
| K4RYR | 11 | 59 | 2026-09-30 | — | Active |
| K4RYS | 11 | 57 | — | — | Available |
| K4RYT | 10 | 55 | 2014-09-28 | 2016-09-29 | Available |
| K4RYU | 11 | 59 | 2017-02-24 | 2019-02-25 | Available |
| K4RYV | 10 | 61 | — | — | Available |
| K4RYW | 10 | 61 | — | — | Available |
| K4RYX | 10 | 63 | — | — | Available |
| K4RYY | 10 | 65 | 2010-03-19 | 2012-03-20 | Available |
| K4RYZ | 10 | 63 | — | — | Available |
| K4RZA | 10 | 55 | 2034-03-02 | — | Active (Vanity) |
| K4RZB | 10 | 59 | 2035-03-08 | — | Active (Vanity) |
| K4RZC | 10 | 61 | — | — | Available |
| K4RZD | 10 | 57 | — | — | Available |
| K4RZE | 10 | 51 | 2034-03-02 | — | Active (Vanity) |
| K4RZF | 10 | 59 | 2030-11-17 | — | Active (Vanity) |
| K4RZG | 9 | 59 | 2027-03-28 | — | Active (Vanity) |
| K4RZH | 10 | 57 | 2005-11-28 | 2007-11-29 | Available |
| K4RZI | 11 | 53 | — | — | Available |
| K4RZJ | 11 | 63 | — | — | Available |
| K4RZK | 10 | 59 | — | — | Available |
| K4RZL | 10 | 59 | — | — | Available |
| K4RZM | 9 | 57 | 2030-08-21 | — | Active (Vanity) |
| K4RZN | 11 | 55 | — | — | Available |
| K4RZO | 10 | 61 | 2034-08-27 | — | Active (Vanity) |
| K4RZP | 10 | 61 | 2034-04-16 | — | Active (Vanity) |
| K4RZQ | 10 | 63 | — | — | Available |
| K4RZR | 11 | 57 | 2027-12-01 | — | Active (Vanity) |
| K4RZS | 11 | 55 | 2017-02-27 | 2019-02-28 | Available |
| K4RZT | 10 | 53 | — | — | Available |
| K4RZU | 11 | 57 | — | — | Available |
| K4RZV | 10 | 59 | 2023-08-31 | 2025-09-01 | Available |
| K4RZW | 10 | 59 | 2036-01-22 | — | Active |
| K4RZX | 10 | 61 | — | — | Available |
| K4RZY | 10 | 63 | — | — | Available |
| K4RZZ | 10 | 61 | 2024-11-26 | 2026-11-27 | Canceled (grace period) |
| K4SAA | 10 | 47 | 2030-12-17 | — | Active (Vanity) |
| K4SAB | 10 | 51 | 2026-11-08 | — | Active (Vanity) |
| K4SAC | 10 | 53 | 2028-02-06 | — | Active (Vanity) |
| K4SAD | 10 | 49 | 2025-09-29 | — | Active (Vanity) |
| K4SAE | 10 | 43 | 2030-11-23 | — | Active (Vanity) |
| K4SAF | 10 | 51 | 2027-05-06 | — | Active |
| K4SAG | 9 | 51 | 2032-08-28 | — | Active (Vanity) |
| K4SAH | 10 | 49 | 2031-03-30 | — | Active (Vanity) |
| K4SAI | 11 | 45 | — | — | Available |
| K4SAJ | 11 | 55 | 2028-01-18 | — | Active (Vanity) |
| K4SAK | 10 | 51 | 2033-03-10 | — | Active |
| K4SAL | 10 | 51 | 2030-12-09 | — | Active (Vanity) |
| K4SAM | 9 | 49 | 2027-01-06 | — | Active |
| K4SAN | 11 | 47 | 2036-06-08 | — | Active |
| K4SAO | 10 | 53 | 2013-12-12 | 2015-12-13 | Available |
| K4SAP | 10 | 53 | 2030-06-12 | — | Active (Vanity) |
| K4SAQ | 10 | 55 | 2034-12-21 | — | Active (Vanity) |
| K4SAR | 11 | 49 | 2028-04-22 | — | Active (Vanity) |
| K4SAS | 11 | 47 | 2033-08-17 | — | Active |
| K4SAT | 10 | 45 | 2028-01-14 | — | Active (Vanity) |
| K4SAU | 11 | 49 | — | — | Available |
| K4SAV | 10 | 51 | 2031-08-27 | — | Active |
| K4SAW | 10 | 51 | 2030-12-19 | — | Active (Vanity) |
| K4SAX | 10 | 53 | 2036-05-29 | — | Active (Vanity) |
| K4SAY | 10 | 55 | 2022-05-19 | 2024-05-20 | Available |
| K4SAZ | 10 | 53 | — | — | Available |
| K4SBA | 10 | 51 | 2024-05-06 | 2026-05-07 | Available |
| K4SBB | 10 | 55 | 2035-11-06 | — | Active (Vanity) |
| K4SBC | 10 | 57 | 2031-03-02 | — | Active (Vanity) |
| K4SBD | 10 | 53 | 2034-09-26 | — | Active (Vanity) |
| K4SBE | 10 | 47 | 2029-09-13 | — | Active (Vanity) |
| K4SBF | 10 | 55 | 2036-04-28 | — | Active (Vanity) |
| K4SBG | 9 | 55 | 2029-03-11 | — | Active (Vanity) |
| K4SBH | 10 | 53 | 2024-05-24 | 2026-05-25 | Available |
| K4SBI | 11 | 49 | 2024-06-17 | 2026-06-18 | Available |
| K4SBJ | 11 | 59 | 2034-05-03 | — | Active (Vanity) |