District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KS4XC | 10 | 59 | 2005-05-19 | 2007-05-20 | Available |
| KS4XD | 10 | 55 | 1999-05-24 | 2001-05-25 | Available |
| KS4XE | 10 | 49 | 2022-07-28 | 2024-07-29 | Available |
| KS4XF | 10 | 57 | 2031-04-30 | — | Active |
| KS4XG | 9 | 57 | 2001-06-16 | 2003-06-17 | Available |
| KS4XH | 10 | 55 | — | — | Available |
| KS4XI | 11 | 51 | 2013-09-07 | 2015-09-08 | Available |
| KS4XJ | 11 | 61 | 2034-07-25 | — | Active |
| KS4XK | 10 | 57 | 2014-04-19 | 2016-04-20 | Available |
| KS4XL | 10 | 57 | 2034-04-19 | — | Active |
| KS4XM | 9 | 55 | 2004-03-29 | 2006-03-30 | Available |
| KS4XN | 11 | 53 | 2024-10-14 | 2026-10-15 | Available |
| KS4XO | 10 | 59 | 2031-12-28 | — | Active |
| KS4XP | 10 | 59 | — | — | Available |
| KS4XQ | 10 | 61 | 2033-08-10 | — | Active |
| KS4XR | 11 | 55 | 2034-01-27 | — | Active |
| KS4XS | 11 | 53 | — | — | Available |
| KS4XT | 10 | 51 | 2022-06-23 | 2024-06-24 | Available |
| KS4XU | 11 | 55 | 2036-11-19 | — | Active |
| KS4XV | 10 | 57 | 2012-06-29 | 2014-06-30 | Available |
| KS4XW | 10 | 57 | 2000-04-28 | 2002-04-29 | Available |
| KS4XX | 10 | 59 | 1998-05-06 | 2000-05-07 | Available |
| KS4XY | 10 | 61 | 2003-06-08 | 2005-06-09 | Available |
| KS4XZ | 10 | 59 | 2015-11-24 | 2017-11-25 | Available |
| KS4YA | 10 | 55 | 2035-01-20 | — | Active |
| KS4YB | 10 | 59 | 2014-10-25 | 2016-10-26 | Available |
| KS4YC | 10 | 61 | 2013-03-23 | 2015-03-24 | Available |
| KS4YD | 10 | 57 | 2024-03-05 | 2026-03-06 | Available |
| KS4YE | 10 | 51 | 2027-02-20 | — | Active |
| KS4YF | 10 | 59 | 2035-05-21 | — | Active |
| KS4YG | 9 | 59 | 2025-02-15 | — | Active |
| KS4YH | 10 | 57 | 2014-07-21 | 2016-07-22 | Available |
| KS4YI | 11 | 53 | — | — | Available |
| KS4YJ | 11 | 63 | 2012-12-22 | 2014-12-23 | Available |
| KS4YK | 10 | 59 | — | — | Available |
| KS4YL | 10 | 59 | 2001-05-15 | 2003-05-16 | Available |
| KS4YM | 9 | 57 | — | — | Available |
| KS4YN | 11 | 55 | 2035-04-21 | — | Active |
| KS4YO | 10 | 61 | 2025-02-09 | — | Active |
| KS4YP | 10 | 61 | 2032-02-11 | — | Active |
| KS4YQ | 10 | 63 | 2034-03-29 | — | Active |
| KS4YR | 11 | 57 | 2015-02-17 | 2017-02-18 | Available |
| KS4YS | 11 | 55 | 2031-04-02 | — | Active |
| KS4YT | 10 | 53 | 2034-08-22 | — | Active |
| KS4YU | 11 | 57 | 2004-01-04 | 2006-01-05 | Available |
| KS4YV | 10 | 59 | 2034-04-29 | — | Active |
| KS4YW | 10 | 59 | — | — | Available |
| KS4YX | 10 | 61 | 2031-11-19 | — | Active |
| KS4YY | 10 | 63 | — | — | Available |
| KS4YZ | 10 | 61 | 2014-11-14 | 2016-11-15 | Available |
| KS4ZA | 10 | 53 | 2034-05-31 | — | Active |
| KS4ZB | 10 | 57 | — | — | Available |
| KS4ZC | 10 | 59 | — | — | Available |
| KS4ZD | 10 | 55 | 2021-06-11 | 2023-06-12 | Available |
| KS4ZE | 10 | 49 | — | — | Available |
| KS4ZF | 10 | 57 | 1997-10-30 | 1999-10-31 | Available |
| KS4ZG | 9 | 57 | 2025-03-18 | — | Active |
| KS4ZH | 10 | 55 | 2005-06-19 | 2007-06-20 | Available |
| KS4ZI | 11 | 51 | 1999-06-16 | 2001-06-17 | Available |
| KS4ZJ | 11 | 61 | 2015-02-03 | 2017-02-04 | Available |
| KS4ZK | 10 | 57 | 2034-07-14 | — | Active |
| KS4ZL | 10 | 57 | 2010-06-10 | 2012-06-11 | Available |
| KS4ZM | 9 | 55 | 2036-09-02 | — | Active (Vanity) |
| KS4ZN | 11 | 53 | 1997-09-17 | 1999-09-18 | Available |
| KS4ZO | 10 | 59 | — | — | Available |
| KS4ZP | 10 | 59 | 2035-03-02 | — | Active |
| KS4ZQ | 10 | 61 | 2002-05-07 | 2004-05-08 | Available |
| KS4ZR | 11 | 55 | 2029-06-22 | — | Active |
| KS4ZS | 11 | 53 | 2034-05-10 | — | Active |
| KS4ZT | 10 | 51 | 2014-07-07 | 2016-07-08 | Available |
| KS4ZU | 11 | 55 | — | — | Available |
| KS4ZV | 10 | 57 | 2033-11-23 | — | Active |
| KS4ZW | 10 | 57 | 2005-03-13 | 2007-03-14 | Available |
| KS4ZX | 10 | 59 | 2014-03-29 | 2016-03-30 | Available |
| KS4ZY | 10 | 61 | 2023-08-14 | 2025-08-15 | Available |
| KS4ZZ | 10 | 59 | 2015-03-31 | 2017-04-01 | Available |
| KT4AA | 9 | 45 | 2034-09-09 | — | Active |
| KT4AB | 9 | 49 | 2025-06-28 | — | Active |
| KT4AC | 9 | 51 | 2034-10-28 | — | Active |
| KT4AD | 9 | 47 | 2032-07-21 | — | Active |
| KT4AE | 9 | 41 | 2035-05-04 | — | Active |
| KT4AF | 9 | 49 | 2025-12-11 | — | Active |
| KT4AG | 8 | 49 | 2005-06-29 | 2007-06-30 | Available |
| KT4AH | 9 | 47 | 2034-10-20 | — | Active |
| KT4AI | 10 | 43 | — | — | Available |
| KT4AJ | 10 | 53 | 1998-03-31 | 2000-04-01 | Available |
| KT4AK | 9 | 49 | 2008-01-28 | 2010-01-29 | Available |
| KT4AL | 9 | 49 | 2025-02-10 | — | Active |
| KT4AM | 8 | 47 | 2035-03-27 | — | Active |
| KT4AN | 10 | 45 | 2034-10-13 | — | Active |
| KT4AO | 9 | 51 | 2012-12-04 | 2014-12-05 | Available |
| KT4AP | 9 | 51 | 2025-07-03 | — | Active |
| KT4AQ | 9 | 53 | 2035-09-01 | — | Active |
| KT4AR | 10 | 47 | 2024-03-05 | 2026-03-06 | Available |
| KT4AS | 10 | 45 | 2034-03-29 | — | Active |
| KT4AT | 9 | 43 | 2031-02-26 | — | Active |
| KT4AU | 10 | 47 | 2018-03-13 | 2020-03-14 | Available |
| KT4AV | 9 | 49 | 2035-07-06 | — | Active |
| KT4AW | 9 | 49 | 2036-04-14 | — | Active |
| KT4AX | 9 | 51 | — | — | Available |