District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KC4SU | 11 | 55 | 2007-02-10 | 2009-02-11 | Available |
| KC4SV | 10 | 57 | 2003-09-28 | 2005-09-29 | Available |
| KC4SW | 10 | 57 | 2028-11-19 | — | Active |
| KC4SX | 10 | 59 | 2026-11-04 | — | Active |
| KC4SY | 10 | 61 | 2005-08-28 | 2007-08-29 | Available |
| KC4SZ | 10 | 59 | 2023-10-13 | 2025-10-14 | Available |
| KC4TA | 9 | 51 | 2026-01-23 | — | Active |
| KC4TB | 9 | 55 | 2005-02-15 | 2007-02-16 | Available |
| KC4TC | 9 | 57 | 2035-09-08 | — | Active |
| KC4TD | 9 | 53 | 2021-05-28 | 2023-05-29 | Available |
| KC4TE | 9 | 47 | 2021-08-27 | 2023-08-28 | Available |
| KC4TF | 9 | 55 | 2018-01-12 | 2020-01-13 | Available |
| KC4TG | 8 | 55 | 2026-12-30 | — | Active |
| KC4TH | 9 | 53 | — | — | Available |
| KC4TI | 10 | 49 | 2025-08-21 | — | Active |
| KC4TJ | 10 | 59 | 2026-04-23 | — | Active |
| KC4TK | 9 | 55 | 2014-04-05 | 2016-04-06 | Available |
| KC4TL | 9 | 55 | 2034-12-01 | — | Active |
| KC4TM | 8 | 53 | 2021-03-19 | 2023-03-20 | Available |
| KC4TN | 10 | 51 | — | — | Available |
| KC4TO | 9 | 57 | 2027-01-22 | — | Active |
| KC4TP | 9 | 57 | 2027-03-12 | — | Active (Vanity) |
| KC4TQ | 9 | 59 | — | — | Available |
| KC4TR | 10 | 53 | — | — | Available |
| KC4TS | 10 | 51 | 2029-08-13 | — | Active (Vanity) |
| KC4TT | 9 | 49 | 2026-10-09 | — | Active |
| KC4TU | 10 | 53 | — | — | Available |
| KC4TV | 9 | 55 | 2021-09-22 | 2023-09-23 | Available |
| KC4TW | 9 | 55 | — | — | Available |
| KC4TX | 9 | 57 | 2001-02-16 | 2003-02-17 | Available |
| KC4TY | 9 | 59 | — | — | Available |
| KC4TZ | 9 | 57 | 2027-09-16 | — | Active |
| KC4UA | 10 | 55 | 2023-06-15 | 2025-06-16 | Available |
| KC4UB | 10 | 59 | 1997-11-19 | 1999-11-20 | Available |
| KC4UC | 10 | 61 | 2021-08-21 | 2023-08-22 | Available |
| KC4UD | 10 | 57 | 1997-11-19 | 1999-11-20 | Available |
| KC4UE | 10 | 51 | 2025-11-28 | — | Active |
| KC4UF | 10 | 59 | 2031-04-30 | — | Active |
| KC4UG | 9 | 59 | 2030-06-08 | — | Active (Vanity) |
| KC4UH | 10 | 57 | — | — | Available |
| KC4UI | 11 | 53 | 2026-03-04 | — | Active |
| KC4UJ | 11 | 63 | 2016-10-07 | 2018-10-08 | Available |
| KC4UK | 10 | 59 | 2017-03-12 | 2019-03-13 | Available |
| KC4UL | 10 | 59 | 2002-03-08 | 2004-03-09 | Available |
| KC4UM | 9 | 57 | 2016-01-31 | 2018-02-01 | Available |
| KC4UN | 11 | 55 | 2028-10-07 | — | Active |
| KC4UO | 10 | 61 | — | — | Available |
| KC4UP | 10 | 61 | — | — | Available |
| KC4UQ | 10 | 63 | 2006-07-17 | 2008-07-18 | Available |
| KC4UR | 11 | 57 | — | — | Available |
| KC4US | 11 | 55 | 2028-08-08 | — | Active |
| KC4UT | 10 | 53 | 2027-03-17 | — | Active (Vanity) |
| KC4UU | 11 | 57 | 2025-05-19 | — | Active |
| KC4UV | 10 | 59 | — | — | Available |
| KC4UW | 10 | 59 | — | — | Available |
| KC4UX | 10 | 61 | 1997-11-13 | 1999-11-14 | Available |
| KC4UY | 10 | 63 | 2025-10-04 | — | Active |
| KC4UZ | 10 | 61 | 2005-04-27 | 2007-04-28 | Available |
| KC4VA | 9 | 57 | 2036-12-09 | — | Active |
| KC4VB | 9 | 61 | — | — | Available |
| KC4VC | 9 | 63 | — | — | Available |
| KC4VD | 9 | 59 | — | — | Available |
| KC4VE | 9 | 53 | 2023-05-06 | 2025-05-07 | Available |
| KC4VF | 9 | 61 | — | — | Available |
| KC4VG | 8 | 61 | 2024-03-05 | 2026-03-06 | Available |
| KC4VH | 9 | 59 | — | — | Available |
| KC4VI | 10 | 55 | 2027-07-14 | — | Active (Vanity) |
| KC4VJ | 10 | 65 | 1997-10-15 | 1999-10-16 | Available |
| KC4VK | 9 | 61 | 2032-02-18 | — | Active (Vanity) |
| KC4VL | 9 | 61 | 2021-05-14 | 2023-05-15 | Available |
| KC4VM | 8 | 59 | — | — | Available |
| KC4VN | 10 | 57 | — | — | Available |
| KC4VO | 9 | 63 | 2033-08-13 | — | Active (Vanity) |
| KC4VP | 9 | 63 | 2003-03-02 | 2005-03-03 | Available |
| KC4VQ | 9 | 65 | 2029-02-12 | — | Active |
| KC4VR | 10 | 59 | — | — | Available |
| KC4VS | 10 | 57 | — | — | Available |
| KC4VT | 9 | 55 | 2027-12-18 | — | Active (Vanity) |
| KC4VU | 10 | 59 | 2021-08-06 | 2023-08-07 | Available |
| KC4VV | 9 | 61 | 2015-11-22 | 2017-11-23 | Available |
| KC4VW | 9 | 61 | 2005-07-28 | 2007-07-29 | Available |
| KC4VX | 9 | 63 | — | — | Available |
| KC4VY | 9 | 65 | — | — | Available |
| KC4VZ | 9 | 63 | 1998-05-28 | 2000-05-29 | Available |
| KC4WA | 9 | 57 | 1997-09-17 | 1999-09-18 | Available |
| KC4WB | 9 | 61 | 2016-03-30 | 2018-03-31 | Available |
| KC4WC | 9 | 63 | 2027-11-28 | — | Active |
| KC4WD | 9 | 59 | 2035-07-01 | — | Active (Vanity) |
| KC4WE | 9 | 53 | 2012-12-01 | 2014-12-02 | Available |
| KC4WF | 9 | 61 | 2006-01-17 | 2008-01-18 | Available |
| KC4WG | 8 | 61 | — | — | Available |
| KC4WH | 9 | 59 | — | — | Available |
| KC4WI | 10 | 55 | — | — | Available |
| KC4WJ | 10 | 65 | 2028-06-05 | — | Active |
| KC4WK | 9 | 61 | 2025-11-28 | — | Active |
| KC4WL | 9 | 61 | — | — | Available |
| KC4WM | 8 | 59 | 2018-03-02 | 2020-03-03 | Available |
| KC4WN | 10 | 57 | 2031-03-26 | — | Active (Vanity) |
| KC4WO | 9 | 63 | — | — | Available |
| KC4WP | 9 | 63 | 2006-11-27 | 2008-11-28 | Available |