District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4SMY | 9 | 57 | 2004-03-29 | 2006-03-30 | Available |
| K4SMZ | 9 | 55 | 2035-07-25 | — | Active (Vanity) |
| K4SNA | 11 | 47 | 2027-07-09 | — | Active |
| K4SNB | 11 | 51 | — | — | Available |
| K4SNC | 11 | 53 | 2011-10-02 | 2013-10-03 | Available |
| K4SND | 11 | 49 | — | — | Available |
| K4SNE | 11 | 43 | 2027-04-04 | — | Active (Vanity) |
| K4SNF | 11 | 51 | 2034-09-09 | — | Active (Vanity) |
| K4SNG | 10 | 51 | 2029-11-30 | — | Active (Vanity) |
| K4SNH | 11 | 49 | 2008-05-30 | 2010-05-31 | Available |
| K4SNI | 12 | 45 | 2028-02-25 | — | Active |
| K4SNJ | 12 | 55 | — | — | Available |
| K4SNK | 11 | 51 | — | — | Available |
| K4SNL | 11 | 51 | 2033-01-26 | — | Active (Vanity) |
| K4SNM | 10 | 49 | — | — | Available |
| K4SNN | 12 | 47 | 2028-01-23 | — | Active (Vanity) |
| K4SNO | 11 | 53 | 2022-11-06 | 2024-11-07 | Available |
| K4SNP | 11 | 53 | 2035-06-23 | — | Active (Vanity) |
| K4SNQ | 11 | 55 | — | — | Available |
| K4SNR | 12 | 49 | — | — | Available |
| K4SNS | 12 | 47 | 2014-09-12 | 2016-09-13 | Available |
| K4SNT | 11 | 45 | 2028-03-04 | — | Active |
| K4SNU | 12 | 49 | — | — | Available |
| K4SNV | 11 | 51 | — | — | Available |
| K4SNW | 11 | 51 | 2030-06-13 | — | Active (Vanity) |
| K4SNX | 11 | 53 | 2027-10-31 | — | Active (Vanity) |
| K4SNY | 11 | 55 | 1999-08-15 | 2001-08-16 | Available |
| K4SNZ | 11 | 53 | — | — | Available |
| K4SOA | 10 | 53 | 2028-02-03 | — | Active |
| K4SOB | 10 | 57 | 2035-02-04 | — | Active (Vanity) |
| K4SOC | 10 | 59 | 2036-03-17 | — | Active (Vanity) |
| K4SOD | 10 | 55 | 2034-05-30 | — | Active (Vanity) |
| K4SOE | 10 | 49 | — | — | Available |
| K4SOF | 10 | 57 | 2035-01-06 | — | Active (Vanity) |
| K4SOG | 9 | 57 | 2027-09-16 | — | Active (Vanity) |
| K4SOH | 10 | 55 | — | — | Available |
| K4SOI | 11 | 51 | 2034-09-07 | — | Active (Vanity) |
| K4SOJ | 11 | 61 | — | — | Available |
| K4SOK | 10 | 57 | 2028-10-20 | — | Active (Vanity) |
| K4SOL | 10 | 57 | 2029-02-03 | — | Active (Vanity) |
| K4SOM | 9 | 55 | 2036-03-03 | — | Active (Vanity) |
| K4SON | 11 | 53 | 2023-04-12 | 2025-04-13 | Available |
| K4SOO | 10 | 59 | 2031-03-23 | — | Active (Vanity) |
| K4SOP | 10 | 59 | 2028-12-02 | — | Active (Vanity) |
| K4SOQ | 10 | 61 | — | — | Available |
| K4SOR | 11 | 55 | — | — | Available |
| K4SOT | 10 | 51 | 2027-03-28 | — | Active (Vanity) |
| K4SOU | 11 | 55 | 2030-06-17 | — | Active (Vanity) |
| K4SOV | 10 | 57 | — | — | Available |
| K4SOW | 10 | 57 | 2030-03-03 | — | Active (Vanity) |
| K4SOX | 10 | 59 | 2026-11-04 | — | Active (Vanity) |
| K4SOY | 10 | 61 | — | — | Available |
| K4SOZ | 10 | 59 | — | — | Available |
| K4SPA | 10 | 53 | 2028-03-28 | — | Active (Vanity) |
| K4SPB | 10 | 57 | 2027-11-25 | — | Active (Vanity) |
| K4SPC | 10 | 59 | 2025-12-11 | — | Active (Vanity) |
| K4SPD | 10 | 55 | 2031-08-13 | — | Active (Vanity) |
| K4SPE | 10 | 49 | 2031-10-25 | — | Active (Vanity) |
| K4SPF | 10 | 57 | 2033-06-22 | — | Active (Vanity) |
| K4SPG | 9 | 57 | 2035-03-12 | — | Active (Vanity) |
| K4SPH | 10 | 55 | 2035-03-11 | — | Active (Vanity) |
| K4SPI | 11 | 51 | — | — | Available |
| K4SPJ | 11 | 61 | 2024-10-07 | 2026-10-08 | Available |
| K4SPK | 10 | 57 | 2030-10-07 | — | Active (Vanity) |
| K4SPL | 10 | 57 | 2022-10-07 | 2024-10-08 | Available |
| K4SPM | 9 | 55 | 2024-05-14 | 2026-05-15 | Available |
| K4SPN | 11 | 53 | 2025-10-06 | — | Active (Vanity) |
| K4SPO | 10 | 59 | 2028-10-07 | — | Active (Vanity) |
| K4SPP | 10 | 59 | — | — | Available |
| K4SPQ | 10 | 61 | — | — | Available |
| K4SPR | 11 | 55 | 2027-06-16 | — | Active (Vanity) |
| K4SPS | 11 | 53 | 2029-12-06 | — | Active (Vanity) |
| K4SPT | 10 | 51 | 2026-02-02 | — | Active (Vanity) |
| K4SPU | 11 | 55 | 2025-11-28 | — | Active |
| K4SPV | 10 | 57 | — | — | Available |
| K4SPW | 10 | 57 | — | — | Available |
| K4SPX | 10 | 59 | 2034-03-15 | — | Active (Vanity) |
| K4SPY | 10 | 61 | 2028-01-15 | — | Active (Vanity) |
| K4SPZ | 10 | 59 | 1997-10-01 | 1999-10-02 | Available |
| K4SQA | 10 | 55 | — | — | Available |
| K4SQB | 10 | 59 | — | — | Available |
| K4SQC | 10 | 61 | 2020-10-09 | 2022-10-10 | Available |
| K4SQD | 10 | 57 | — | — | Available |
| K4SQE | 10 | 51 | — | — | Available |
| K4SQF | 10 | 59 | — | — | Available |
| K4SQG | 9 | 59 | — | — | Available |
| K4SQH | 10 | 57 | — | — | Available |
| K4SQI | 11 | 53 | 2026-08-05 | — | Active (Vanity) |
| K4SQJ | 11 | 63 | — | — | Available |
| K4SQK | 10 | 59 | — | — | Available |
| K4SQL | 10 | 59 | 2032-06-07 | — | Active (Vanity) |
| K4SQM | 9 | 57 | 2036-11-14 | — | Active |
| K4SQN | 11 | 55 | — | — | Available |
| K4SQO | 10 | 61 | — | — | Available |
| K4SQP | 10 | 61 | 2035-12-11 | — | Active (Vanity) |
| K4SQQ | 10 | 63 | — | — | Available |
| K4SQR | 11 | 57 | 2018-05-06 | 2020-05-07 | Available |
| K4SQS | 11 | 55 | — | — | Available |
| K4SQT | 10 | 53 | 2031-05-14 | — | Active (Vanity) |
| K4SQU | 11 | 57 | — | — | Available |