District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KF4CI | 10 | 55 | 2001-05-07 | 2003-05-08 | Available |
| KF4CJ | 10 | 65 | 2019-07-06 | 2021-07-07 | Available |
| KF4CK | 9 | 61 | 1999-04-25 | 2001-04-26 | Available |
| KF4CL | 9 | 61 | 2033-01-23 | — | Active (Vanity) |
| KF4CM | 8 | 59 | 2007-04-04 | 2009-04-05 | Available |
| KF4CN | 10 | 57 | — | — | Available |
| KF4CO | 9 | 63 | — | — | Available |
| KF4CP | 9 | 63 | 2031-02-12 | — | Active |
| KF4CQ | 9 | 65 | 2031-11-11 | — | Active (Vanity) |
| KF4CR | 10 | 59 | 1997-10-15 | 1999-10-16 | Available |
| KF4CS | 10 | 57 | — | — | Available |
| KF4CT | 9 | 55 | — | — | Available |
| KF4CU | 10 | 59 | 2033-08-17 | — | Active (Vanity) |
| KF4CV | 9 | 61 | 2017-11-05 | 2019-11-06 | Available |
| KF4CW | 9 | 61 | 2016-06-19 | 2018-06-20 | Available |
| KF4CX | 9 | 63 | 2013-10-05 | 2015-10-06 | Available |
| KF4CY | 9 | 65 | — | — | Available |
| KF4CZ | 9 | 63 | 1998-03-29 | 2000-03-30 | Available |
| KF4DA | 9 | 53 | 2000-05-26 | 2002-05-27 | Available |
| KF4DB | 9 | 57 | 2008-05-04 | 2010-05-05 | Available |
| KF4DC | 9 | 59 | 2034-06-21 | — | Active (Vanity) |
| KF4DD | 9 | 55 | 2033-09-23 | — | Active (Vanity) |
| KF4DE | 9 | 49 | 1998-03-12 | 2000-03-13 | Available |
| KF4DF | 9 | 57 | 2027-09-15 | — | Active |
| KF4DG | 8 | 57 | 2028-09-23 | — | Active (Vanity) |
| KF4DH | 9 | 55 | — | — | Available |
| KF4DI | 10 | 51 | 1997-10-20 | 1999-10-21 | Available |
| KF4DJ | 10 | 61 | 2001-11-26 | 2003-11-27 | Available |
| KF4DK | 9 | 57 | 1999-09-05 | 2001-09-06 | Available |
| KF4DL | 9 | 57 | — | — | Available |
| KF4DM | 8 | 55 | 1999-02-28 | 2001-03-01 | Available |
| KF4DN | 10 | 53 | 2007-05-15 | 2009-05-16 | Available |
| KF4DO | 9 | 59 | — | — | Available |
| KF4DP | 9 | 59 | — | — | Available |
| KF4DQ | 9 | 61 | 2009-06-27 | 2011-06-28 | Available |
| KF4DR | 10 | 55 | 2008-01-09 | 2010-01-10 | Available |
| KF4DS | 10 | 53 | — | — | Available |
| KF4DT | 9 | 51 | 2028-01-27 | — | Active |
| KF4DU | 10 | 55 | 2028-08-26 | — | Active |
| KF4DV | 9 | 57 | 2036-09-19 | — | Active (Vanity) |
| KF4DW | 9 | 57 | — | — | Available |
| KF4DX | 9 | 59 | 2036-03-22 | — | Active (Vanity) |
| KF4DY | 9 | 61 | 2024-03-05 | 2026-03-06 | Available |
| KF4DZ | 9 | 59 | 2012-06-02 | 2014-06-03 | Available |
| KF4EA | 9 | 47 | 2027-03-05 | — | Active |
| KF4EB | 9 | 51 | — | — | Available |
| KF4EC | 9 | 53 | — | — | Available |
| KF4ED | 9 | 49 | 2034-10-18 | — | Active |
| KF4EE | 9 | 43 | 2027-10-21 | — | Active |
| KF4EF | 9 | 51 | — | — | Available |
| KF4EG | 8 | 51 | — | — | Available |
| KF4EH | 9 | 49 | 1997-09-08 | 1999-09-09 | Available |
| KF4EI | 10 | 45 | — | — | Available |
| KF4EJ | 10 | 55 | — | — | Available |
| KF4EK | 9 | 51 | 2027-03-20 | — | Active |
| KF4EL | 9 | 51 | 2007-02-25 | 2009-02-26 | Available |
| KF4EM | 8 | 49 | 2027-02-22 | — | Active |
| KF4EN | 10 | 47 | — | — | Available |
| KF4EO | 9 | 53 | — | — | Available |
| KF4EP | 9 | 53 | 2004-03-06 | 2006-03-07 | Available |
| KF4EQ | 9 | 55 | — | — | Available |
| KF4ER | 10 | 49 | — | — | Available |
| KF4ES | 10 | 47 | 2027-11-28 | — | Active |
| KF4ET | 9 | 45 | 2007-02-03 | 2009-02-04 | Available |
| KF4EU | 10 | 49 | — | — | Available |
| KF4EV | 9 | 51 | 2027-12-23 | — | Active |
| KF4EW | 9 | 51 | 2024-03-05 | 2026-03-06 | Available |
| KF4EX | 9 | 53 | — | — | Available |
| KF4EY | 9 | 55 | 2002-03-28 | 2004-03-29 | Available |
| KF4EZ | 9 | 53 | 2028-08-19 | — | Active |
| KF4FA | 9 | 55 | — | — | Available |
| KF4FB | 9 | 59 | — | — | Available |
| KF4FC | 9 | 61 | 2036-01-05 | — | Active (Vanity) |
| KF4FD | 9 | 57 | 2029-03-26 | — | Active |
| KF4FE | 9 | 51 | — | — | Available |
| KF4FF | 9 | 59 | 2017-05-27 | 2019-05-28 | Available |
| KF4FG | 8 | 59 | 1998-12-30 | 2000-12-31 | Available |
| KF4FH | 9 | 57 | — | — | Available |
| KF4FI | 10 | 53 | — | — | Available |
| KF4FJ | 10 | 63 | — | — | Available |
| KF4FK | 9 | 59 | 2031-04-30 | — | Active (Vanity) |
| KF4FL | 9 | 59 | 2011-08-26 | 2013-08-27 | Available |
| KF4FM | 8 | 57 | 2034-04-19 | — | Active |
| KF4FN | 10 | 55 | — | — | Available |
| KF4FO | 9 | 61 | 2026-04-28 | 2028-04-29 | Canceled (grace period) |
| KF4FP | 9 | 61 | 1999-02-10 | 2001-02-11 | Available |
| KF4FQ | 9 | 63 | 2025-10-06 | — | Active (Vanity) |
| KF4FR | 10 | 57 | 2008-02-23 | 2010-02-24 | Available |
| KF4FS | 10 | 55 | — | — | Available |
| KF4FT | 9 | 53 | 2007-05-16 | 2009-05-17 | Available |
| KF4FU | 10 | 57 | — | — | Available |
| KF4FV | 9 | 59 | 2029-03-24 | — | Active |
| KF4FW | 9 | 59 | 2034-12-28 | — | Active |
| KF4FX | 9 | 61 | 2007-02-21 | 2009-02-22 | Available |
| KF4FY | 9 | 63 | — | — | Available |
| KF4FZ | 9 | 61 | 2007-11-05 | 2009-11-06 | Available |
| KF4GA | 8 | 55 | 2027-04-16 | — | Active |
| KF4GB | 8 | 59 | 2007-08-13 | 2009-08-14 | Available |
| KF4GC | 8 | 61 | 1997-10-16 | 1999-10-17 | Available |
| KF4GD | 8 | 57 | 2008-05-12 | 2010-05-13 | Available |