District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4SFG | 9 | 55 | 2028-02-09 | — | Active (Vanity) |
| K4SFH | 10 | 53 | 2031-12-17 | — | Active (Vanity) |
| K4SFI | 11 | 49 | 2027-01-30 | — | Active |
| K4SFJ | 11 | 59 | 2016-09-08 | 2018-09-09 | Available |
| K4SFK | 10 | 55 | — | — | Available |
| K4SFL | 10 | 55 | 2034-07-13 | — | Active (Vanity) |
| K4SFM | 9 | 53 | 2018-07-24 | 2020-07-25 | Available |
| K4SFN | 11 | 51 | 2004-07-14 | 2006-07-15 | Available |
| K4SFO | 10 | 57 | 2033-03-17 | — | Active (Vanity) |
| K4SFP | 10 | 57 | 2030-10-30 | — | Active (Vanity) |
| K4SFQ | 10 | 59 | 2026-01-05 | — | Active (Vanity) |
| K4SFR | 11 | 53 | 2028-01-26 | — | Active (Vanity) |
| K4SFS | 11 | 51 | — | — | Available |
| K4SFT | 10 | 49 | 2029-09-17 | — | Active (Vanity) |
| K4SFU | 11 | 53 | — | — | Available |
| K4SFV | 10 | 55 | — | — | Available |
| K4SFW | 10 | 55 | 2008-06-05 | 2010-06-06 | Available |
| K4SFX | 10 | 57 | 2033-12-14 | — | Active (Vanity) |
| K4SFY | 10 | 59 | — | — | Available |
| K4SFZ | 10 | 57 | — | — | Available |
| K4SGA | 9 | 51 | 2028-12-16 | — | Active (Vanity) |
| K4SGB | 9 | 55 | 2008-11-12 | 2010-11-13 | Available |
| K4SGC | 9 | 57 | 2033-03-13 | — | Active (Vanity) |
| K4SGD | 9 | 53 | 2036-01-09 | — | Active (Vanity) |
| K4SGE | 9 | 47 | 2029-05-17 | — | Active (Vanity) |
| K4SGF | 9 | 55 | 2023-03-12 | 2025-03-13 | Available |
| K4SGG | 8 | 55 | — | — | Available |
| K4SGH | 9 | 53 | 2027-07-14 | — | Active (Vanity) |
| K4SGI | 10 | 49 | 2018-04-30 | 2020-05-01 | Available |
| K4SGJ | 10 | 59 | — | — | Available |
| K4SGK | 9 | 55 | 2032-02-01 | — | Active (Vanity) |
| K4SGL | 9 | 55 | 2024-05-17 | 2026-05-18 | Available |
| K4SGM | 8 | 53 | 2035-10-16 | — | Active (Vanity) |
| K4SGN | 10 | 51 | 2034-01-06 | — | Active |
| K4SGO | 9 | 57 | — | — | Available |
| K4SGP | 9 | 57 | 2033-06-22 | — | Active (Vanity) |
| K4SGQ | 9 | 59 | 2004-05-19 | 2006-05-20 | Available |
| K4SGR | 10 | 53 | 2033-04-20 | — | Active |
| K4SGS | 10 | 51 | 2034-02-10 | — | Active (Vanity) |
| K4SGT | 9 | 49 | 2036-03-15 | — | Active (Vanity) |
| K4SGU | 10 | 53 | — | — | Available |
| K4SGV | 9 | 55 | — | — | Available |
| K4SGW | 9 | 55 | 2035-11-28 | — | Active (Vanity) |
| K4SGX | 9 | 57 | — | — | Available |
| K4SGY | 9 | 59 | — | — | Available |
| K4SGZ | 9 | 57 | — | — | Available |
| K4SHA | 10 | 49 | 2032-03-13 | — | Active (Vanity) |
| K4SHB | 10 | 53 | 2035-04-28 | — | Active (Vanity) |
| K4SHC | 10 | 55 | — | — | Available |
| K4SHD | 10 | 51 | 2027-07-24 | — | Active |
| K4SHE | 10 | 45 | 2020-05-14 | 2022-05-15 | Available |
| K4SHF | 10 | 53 | 2034-04-09 | — | Active (Vanity) |
| K4SHG | 9 | 53 | 2020-06-26 | 2022-06-27 | Available |
| K4SHH | 10 | 51 | — | — | Available |
| K4SHI | 11 | 47 | 2028-01-09 | — | Active |
| K4SHJ | 11 | 57 | 2016-03-05 | 2018-03-06 | Available |
| K4SHK | 10 | 53 | 2036-01-05 | — | Active (Vanity) |
| K4SHL | 10 | 53 | 2033-12-16 | — | Active (Vanity) |
| K4SHM | 9 | 51 | 2034-08-09 | — | Active (Vanity) |
| K4SHN | 11 | 49 | 2031-06-22 | — | Active (Vanity) |
| K4SHO | 10 | 55 | 2028-05-13 | — | Active (Vanity) |
| K4SHP | 10 | 55 | 2032-04-26 | — | Active (Vanity) |
| K4SHQ | 10 | 57 | 2028-11-01 | — | Active (Vanity) |
| K4SHR | 11 | 51 | 2026-01-23 | 2028-01-24 | Canceled (grace period) |
| K4SHS | 11 | 49 | 2031-08-31 | — | Active (Vanity) |
| K4SHT | 10 | 47 | — | — | Available |
| K4SHU | 11 | 51 | 2021-02-26 | 2023-02-27 | Available |
| K4SHV | 10 | 53 | — | — | Available |
| K4SHW | 10 | 53 | 2029-07-12 | — | Active (Vanity) |
| K4SHX | 10 | 55 | — | — | Pending Application |
| K4SHY | 10 | 57 | 2034-03-15 | — | Active |
| K4SHZ | 10 | 55 | — | — | Available |
| K4SIA | 11 | 45 | 2015-08-02 | 2017-08-03 | Available |
| K4SIB | 11 | 49 | — | — | Available |
| K4SIC | 11 | 51 | — | — | Available |
| K4SID | 11 | 47 | 2028-08-17 | — | Active (Vanity) |
| K4SIE | 11 | 41 | — | — | Available |
| K4SIF | 11 | 49 | — | — | Available |
| K4SIG | 10 | 49 | 2033-05-31 | — | Active (Vanity) |
| K4SIH | 11 | 47 | 2014-07-17 | 2016-07-18 | Available |
| K4SII | 12 | 43 | 2016-06-20 | 2018-06-21 | Available |
| K4SIJ | 12 | 53 | — | — | Available |
| K4SIK | 11 | 49 | — | — | Available |
| K4SIL | 11 | 49 | 2033-09-17 | — | Active (Vanity) |
| K4SIM | 10 | 47 | 2028-03-14 | — | Active (Vanity) |
| K4SIN | 12 | 45 | — | — | Available |
| K4SIO | 11 | 51 | — | — | Available |
| K4SIP | 11 | 51 | 2035-02-20 | — | Active (Vanity) |
| K4SIQ | 11 | 53 | 2033-09-07 | — | Active (Vanity) |
| K4SIR | 12 | 47 | 2027-01-24 | — | Active |
| K4SIS | 12 | 45 | 2027-03-17 | — | Active (Vanity) |
| K4SIT | 11 | 43 | 2030-02-25 | — | Active (Vanity) |
| K4SIU | 12 | 47 | 2023-09-02 | 2025-09-03 | Available |
| K4SIV | 11 | 49 | — | — | Available |
| K4SIW | 11 | 49 | — | — | Available |
| K4SIX | 11 | 51 | 2029-04-13 | — | Active (Vanity) |
| K4SIY | 11 | 53 | 2031-01-12 | — | Active (Vanity) |
| K4SIZ | 11 | 51 | — | — | Available |
| K4SJA | 11 | 55 | 2030-08-29 | — | Active (Vanity) |
| K4SJB | 11 | 59 | 2032-10-10 | — | Active (Vanity) |