District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| K4BUE | 10 | 49 | 1998-04-26 | 2000-04-27 | Available |
| K4BUF | 10 | 57 | 2029-02-14 | — | Active (Vanity) |
| K4BUG | 9 | 57 | 2028-09-03 | — | Active |
| K4BUH | 10 | 55 | 1998-11-29 | 2000-11-30 | Available |
| K4BUI | 11 | 51 | — | — | Available |
| K4BUJ | 11 | 61 | 2024-03-05 | 2026-03-06 | Available |
| K4BUK | 10 | 57 | 2027-08-15 | — | Active (Vanity) |
| K4BUL | 10 | 57 | 2015-06-07 | 2017-06-08 | Available |
| K4BUM | 9 | 55 | 2031-05-27 | — | Active (Vanity) |
| K4BUN | 11 | 53 | 2033-03-01 | — | Active (Vanity) |
| K4BUO | 10 | 59 | — | — | Available |
| K4BUP | 10 | 59 | — | — | Available |
| K4BUQ | 10 | 61 | 2017-02-21 | 2019-02-22 | Available |
| K4BUR | 11 | 55 | 2032-04-03 | — | Active (Vanity) |
| K4BUS | 11 | 53 | 2035-10-23 | — | Active (Vanity) |
| K4BUT | 10 | 51 | — | — | Available |
| K4BUU | 11 | 55 | 2028-03-13 | — | Active (Vanity) |
| K4BUV | 10 | 57 | — | — | Available |
| K4BUW | 10 | 57 | — | — | Available |
| K4BUX | 10 | 59 | 2026-12-24 | — | Active (Vanity) |
| K4BUY | 10 | 61 | 2035-11-28 | — | Active |
| K4BUZ | 10 | 59 | 2034-07-19 | — | Active (Vanity) |
| K4BVA | 9 | 55 | 2027-03-17 | — | Active (Vanity) |
| K4BVB | 9 | 59 | 2027-07-23 | — | Active |
| K4BVC | 9 | 61 | — | — | Available |
| K4BVD | 9 | 57 | 2027-05-20 | — | Active (Vanity) |
| K4BVE | 9 | 51 | 2034-05-24 | — | Active (Vanity) |
| K4BVF | 9 | 59 | — | — | Available |
| K4BVG | 8 | 59 | 2007-04-23 | 2009-04-24 | Available |
| K4BVH | 9 | 57 | — | — | Available |
| K4BVI | 10 | 53 | — | — | Available |
| K4BVJ | 10 | 63 | — | — | Available |
| K4BVK | 9 | 59 | — | — | Available |
| K4BVL | 9 | 59 | 2017-02-20 | 2019-02-21 | Available |
| K4BVM | 8 | 57 | 2028-03-27 | — | Active |
| K4BVN | 10 | 55 | 2016-06-18 | 2018-06-19 | Available |
| K4BVO | 9 | 61 | — | — | Available |
| K4BVP | 9 | 61 | 2032-12-13 | — | Active (Vanity) |
| K4BVQ | 9 | 63 | 2021-11-05 | 2023-11-06 | Available |
| K4BVR | 10 | 57 | — | — | Available |
| K4BVS | 10 | 55 | 2028-10-30 | — | Active (Vanity) |
| K4BVT | 9 | 53 | 2021-10-29 | 2023-10-30 | Available |
| K4BVU | 10 | 57 | — | — | Available |
| K4BVV | 9 | 59 | — | — | Available |
| K4BVW | 9 | 59 | — | — | Available |
| K4BVX | 9 | 61 | — | — | Available |
| K4BVY | 9 | 63 | 2032-01-07 | — | Active (Vanity) |
| K4BVZ | 9 | 61 | 2010-07-19 | 2012-07-20 | Available |
| K4BWA | 9 | 55 | 2032-04-19 | — | Active (Vanity) |
| K4BWB | 9 | 59 | 2028-04-25 | — | Active (Vanity) |
| K4BWC | 9 | 61 | 2033-09-29 | — | Active (Vanity) |
| K4BWD | 9 | 57 | 2033-11-03 | — | Active (Vanity) |
| K4BWE | 9 | 51 | — | — | Available |
| K4BWF | 9 | 59 | — | — | Available |
| K4BWG | 8 | 59 | 2029-11-03 | — | Active (Vanity) |
| K4BWH | 9 | 57 | 2027-09-14 | — | Active (Vanity) |
| K4BWI | 10 | 53 | 2030-11-17 | — | Active (Vanity) |
| K4BWJ | 10 | 63 | — | — | Available |
| K4BWK | 9 | 59 | — | — | Available |
| K4BWL | 9 | 59 | 2031-12-10 | — | Active |
| K4BWM | 8 | 57 | 2029-03-05 | — | Active (Vanity) |
| K4BWN | 10 | 55 | 2033-12-01 | — | Active (Vanity) |
| K4BWO | 9 | 61 | — | — | Available |
| K4BWP | 9 | 61 | 2029-05-18 | — | Active (Vanity) |
| K4BWQ | 9 | 63 | 2036-12-12 | — | Active |
| K4BWR | 10 | 57 | 2016-07-10 | 2018-07-11 | Available |
| K4BWS | 10 | 55 | 2037-01-02 | — | Active |
| K4BWT | 9 | 53 | 2028-07-12 | — | Active (Vanity) |
| K4BWU | 10 | 57 | 2016-04-12 | 2018-04-13 | Available |
| K4BWV | 9 | 59 | 2029-05-19 | — | Active |
| K4BWW | 9 | 59 | 2033-09-10 | — | Active (Vanity) |
| K4BWX | 9 | 61 | 2033-02-22 | — | Active (Vanity) |
| K4BWY | 9 | 63 | 2000-07-20 | 2002-07-21 | Available |
| K4BWZ | 9 | 61 | — | — | Available |
| K4BXA | 9 | 57 | — | — | Available |
| K4BXB | 9 | 61 | — | — | Available |
| K4BXC | 9 | 63 | 2030-12-18 | — | Active (Vanity) |
| K4BXD | 9 | 59 | 2027-12-16 | — | Active (Vanity) |
| K4BXE | 9 | 53 | — | — | Available |
| K4BXF | 9 | 61 | — | — | Available |
| K4BXG | 8 | 61 | — | — | Available |
| K4BXH | 9 | 59 | — | — | Available |
| K4BXI | 10 | 55 | — | — | Available |
| K4BXJ | 10 | 65 | 2029-11-13 | — | Active (Vanity) |
| K4BXK | 9 | 61 | 2030-12-18 | — | Active (Vanity) |
| K4BXL | 9 | 61 | — | — | Available |
| K4BXM | 8 | 59 | 2031-05-07 | — | Active (Vanity) |
| K4BXN | 10 | 57 | 2016-07-24 | 2018-07-25 | Available |
| K4BXO | 9 | 63 | — | — | Available |
| K4BXP | 9 | 63 | 2027-08-23 | — | Active |
| K4BXQ | 9 | 65 | — | — | Available |
| K4BXR | 10 | 59 | 2026-06-18 | — | Active (Vanity) |
| K4BXS | 10 | 57 | 2021-01-17 | 2023-01-18 | Available |
| K4BXT | 9 | 55 | 2033-09-30 | — | Active (Vanity) |
| K4BXU | 10 | 59 | 2024-07-14 | 2026-07-15 | Available |
| K4BXV | 9 | 61 | — | — | Available |
| K4BXW | 9 | 61 | — | — | Available |
| K4BXX | 9 | 63 | 2035-08-11 | — | Active (Vanity) |
| K4BXY | 9 | 65 | 2024-03-22 | 2026-03-23 | Available |
| K4BXZ | 9 | 63 | 2024-03-22 | 2026-03-23 | Available |