District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KB4RW | 10 | 57 | 2013-02-16 | 2015-02-17 | Available |
| KB4RX | 10 | 59 | 2028-11-03 | — | Active |
| KB4RY | 10 | 61 | — | — | Available |
| KB4RZ | 10 | 59 | 2025-10-12 | — | Active |
| KB4SA | 10 | 51 | 2022-02-24 | 2024-02-25 | Available |
| KB4SB | 10 | 55 | 2021-03-12 | 2023-03-13 | Available |
| KB4SC | 10 | 57 | 2035-08-16 | — | Active (Vanity) |
| KB4SD | 10 | 53 | — | — | Available |
| KB4SE | 10 | 47 | — | — | Available |
| KB4SF | 10 | 55 | — | — | Available |
| KB4SG | 9 | 55 | 2036-12-17 | — | Active (Vanity) |
| KB4SH | 10 | 53 | 2034-12-12 | — | Active |
| KB4SI | 11 | 49 | 2014-08-18 | 2016-08-19 | Available |
| KB4SJ | 11 | 59 | — | — | Available |
| KB4SK | 10 | 55 | 2004-08-17 | 2006-08-18 | Available |
| KB4SL | 10 | 55 | 2034-05-10 | — | Active |
| KB4SM | 9 | 53 | 2020-07-17 | 2022-07-18 | Available |
| KB4SN | 11 | 51 | — | — | Available |
| KB4SO | 10 | 57 | 1999-06-17 | 2001-06-18 | Available |
| KB4SP | 10 | 57 | 2012-06-26 | 2014-06-27 | Available |
| KB4SQ | 10 | 59 | — | — | Available |
| KB4SR | 11 | 53 | 2014-05-31 | 2016-06-01 | Available |
| KB4SS | 11 | 51 | 2024-04-05 | 2026-04-06 | Available |
| KB4ST | 10 | 49 | 2035-09-16 | — | Active (Vanity) |
| KB4SU | 11 | 53 | 2014-03-29 | 2016-03-30 | Available |
| KB4SV | 10 | 55 | 2024-07-09 | 2026-07-10 | Available |
| KB4SW | 10 | 55 | 2032-04-28 | — | Active |
| KB4SX | 10 | 57 | 2024-07-20 | 2026-07-21 | Available |
| KB4SY | 10 | 59 | — | — | Available |
| KB4SZ | 10 | 57 | 2028-01-15 | — | Active |
| KB4TA | 9 | 49 | 2034-07-16 | — | Active |
| KB4TB | 9 | 53 | 2035-04-18 | — | Active (Vanity) |
| KB4TC | 9 | 55 | 2033-06-06 | — | Active (Vanity) |
| KB4TD | 9 | 51 | — | — | Available |
| KB4TE | 9 | 45 | 2027-07-18 | — | Active |
| KB4TF | 9 | 53 | — | — | Available |
| KB4TG | 8 | 53 | 2034-04-12 | — | Active |
| KB4TH | 9 | 51 | 2034-03-23 | — | Active |
| KB4TI | 10 | 47 | 2013-03-16 | 2015-03-17 | Available |
| KB4TJ | 10 | 57 | 2000-10-14 | 2002-10-15 | Available |
| KB4TK | 9 | 53 | — | — | Available |
| KB4TL | 9 | 53 | — | — | Available |
| KB4TM | 8 | 51 | 2020-06-30 | 2022-07-01 | Available |
| KB4TN | 10 | 49 | — | — | Available |
| KB4TO | 9 | 55 | — | — | Available |
| KB4TP | 9 | 55 | 2009-09-22 | 2011-09-23 | Available |
| KB4TQ | 9 | 57 | — | — | Available |
| KB4TR | 10 | 51 | — | — | Available |
| KB4TS | 10 | 49 | 2014-03-30 | 2016-03-31 | Available |
| KB4TT | 9 | 47 | — | — | Available |
| KB4TU | 10 | 51 | — | — | Available |
| KB4TV | 9 | 53 | 2031-11-06 | — | Active (Vanity) |
| KB4TW | 9 | 53 | — | — | Available |
| KB4TX | 9 | 55 | — | — | Available |
| KB4TY | 9 | 57 | 2034-07-10 | — | Active |
| KB4TZ | 9 | 55 | 2036-07-30 | — | Active |
| KB4UA | 10 | 53 | 2014-04-18 | 2016-04-19 | Available |
| KB4UB | 10 | 57 | 2005-11-22 | 2007-11-23 | Available |
| KB4UC | 10 | 59 | — | — | Available |
| KB4UD | 10 | 55 | 2017-10-31 | 2019-11-01 | Available |
| KB4UE | 10 | 49 | — | — | Available |
| KB4UF | 10 | 57 | 2027-10-30 | — | Active (Vanity) |
| KB4UG | 9 | 57 | 2000-11-14 | 2002-11-15 | Available |
| KB4UH | 10 | 55 | 2015-08-14 | 2017-08-15 | Available |
| KB4UI | 11 | 51 | 2011-09-10 | 2013-09-11 | Available |
| KB4UJ | 11 | 61 | — | — | Available |
| KB4UK | 10 | 57 | — | — | Available |
| KB4UL | 10 | 57 | 2020-02-28 | 2022-03-01 | Available |
| KB4UM | 9 | 55 | — | — | Available |
| KB4UN | 11 | 53 | — | — | Available |
| KB4UO | 10 | 59 | 2020-10-16 | 2022-10-17 | Available |
| KB4UP | 10 | 59 | 1997-10-06 | 1999-10-07 | Available |
| KB4UQ | 10 | 61 | — | — | Available |
| KB4UR | 11 | 55 | 2036-01-27 | — | Active (Vanity) |
| KB4US | 11 | 53 | 2023-02-09 | 2025-02-10 | Available |
| KB4UT | 10 | 51 | 2033-02-26 | — | Active (Vanity) |
| KB4UU | 11 | 55 | — | — | Available |
| KB4UV | 10 | 57 | — | — | Available |
| KB4UW | 10 | 57 | 2018-02-03 | 2020-02-04 | Available |
| KB4UX | 10 | 59 | — | — | Available |
| KB4UY | 10 | 61 | 2028-07-30 | — | Active |
| KB4UZ | 10 | 59 | — | — | Available |
| KB4VA | 9 | 55 | — | — | Available |
| KB4VB | 9 | 59 | — | — | Available |
| KB4VC | 9 | 61 | 2021-04-19 | 2023-04-20 | Available |
| KB4VD | 9 | 57 | 2028-02-05 | — | Active |
| KB4VE | 9 | 51 | — | — | Available |
| KB4VF | 9 | 59 | — | — | Available |
| KB4VG | 8 | 59 | 2024-03-05 | 2026-03-06 | Available |
| KB4VH | 9 | 57 | 2034-09-10 | — | Active |
| KB4VI | 10 | 53 | 2001-07-16 | 2003-07-17 | Available |
| KB4VJ | 10 | 63 | 2004-07-15 | 2006-07-16 | Available |
| KB4VK | 9 | 59 | 2014-07-15 | 2016-07-16 | Available |
| KB4VL | 9 | 59 | 2034-07-21 | — | Active |
| KB4VM | 8 | 57 | 2014-11-22 | 2016-11-23 | Available |
| KB4VN | 10 | 55 | — | — | Available |
| KB4VO | 9 | 61 | — | — | Available |
| KB4VP | 9 | 61 | 2004-05-31 | 2006-06-01 | Available |
| KB4VQ | 9 | 63 | — | — | Available |
| KB4VR | 10 | 57 | — | — | Available |