District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| KO4EY | 9 | 57 | — | — | Available |
| KO4EZ | 9 | 55 | — | — | Available |
| KO4FA | 9 | 57 | 2025-05-05 | — | Active |
| KO4FB | 9 | 61 | 2022-10-06 | 2024-10-07 | Available |
| KO4FC | 9 | 63 | 1997-10-07 | 1999-10-08 | Available |
| KO4FD | 9 | 59 | 2034-08-09 | — | Active (Vanity) |
| KO4FE | 9 | 53 | 2031-10-13 | — | Active |
| KO4FF | 9 | 61 | 2011-07-16 | 2013-07-17 | Available |
| KO4FG | 8 | 61 | 1999-11-17 | 2001-11-18 | Available |
| KO4FH | 9 | 59 | 2031-07-23 | — | Active |
| KO4FI | 10 | 55 | 2021-07-23 | 2023-07-24 | Available |
| KO4FJ | 10 | 65 | 2001-01-17 | 2003-01-18 | Available |
| KO4FK | 9 | 61 | 2021-07-23 | 2023-07-24 | Available |
| KO4FL | 9 | 61 | 2031-12-07 | — | Active |
| KO4FM | 8 | 59 | — | — | Available |
| KO4FN | 10 | 57 | 2021-07-23 | 2023-07-24 | Available |
| KO4FO | 9 | 63 | — | — | Available |
| KO4FP | 9 | 63 | 2001-07-23 | 2003-07-24 | Available |
| KO4FQ | 9 | 65 | 2001-07-30 | 2003-07-31 | Available |
| KO4FR | 10 | 59 | 2031-11-26 | — | Active |
| KO4FS | 10 | 57 | 2034-07-13 | — | Active |
| KO4FT | 9 | 55 | 1997-10-09 | 1999-10-10 | Available |
| KO4FU | 10 | 59 | 2011-07-30 | 2013-07-31 | Available |
| KO4FV | 9 | 61 | 2031-07-30 | — | Active |
| KO4FW | 9 | 61 | — | — | Available |
| KO4FX | 9 | 63 | 2034-12-13 | — | Active (Vanity) |
| KO4FY | 9 | 65 | 2001-08-06 | 2003-08-07 | Available |
| KO4FZ | 9 | 63 | 2011-06-07 | 2013-06-08 | Available |
| KO4GA | 8 | 57 | 2031-08-06 | — | Active |
| KO4GB | 8 | 61 | 2031-08-06 | — | Active |
| KO4GC | 8 | 63 | — | — | Available |
| KO4GD | 8 | 59 | — | — | Available |
| KO4GE | 8 | 53 | 2021-08-06 | 2023-08-07 | Available |
| KO4GF | 8 | 61 | — | — | Available |
| KO4GG | 7 | 61 | — | — | Available |
| KO4GH | 8 | 59 | — | — | Available |
| KO4GI | 9 | 55 | 2021-08-06 | 2023-08-07 | Available |
| KO4GJ | 9 | 65 | — | — | Available |
| KO4GK | 8 | 61 | 1997-12-10 | 1999-12-11 | Available |
| KO4GL | 8 | 61 | 2028-01-09 | — | Active |
| KO4GM | 7 | 59 | 2000-06-03 | 2002-06-04 | Available |
| KO4GN | 9 | 57 | 2031-08-06 | — | Active |
| KO4GO | 8 | 63 | 2011-08-06 | 2013-08-07 | Available |
| KO4GP | 8 | 63 | 2031-12-31 | — | Active |
| KO4GQ | 8 | 65 | — | — | Available |
| KO4GR | 9 | 59 | — | — | Available |
| KO4GS | 9 | 57 | 2016-04-05 | 2018-04-06 | Available |
| KO4GT | 8 | 55 | 2034-11-15 | — | Active (Vanity) |
| KO4GU | 9 | 59 | 2021-08-06 | 2023-08-07 | Available |
| KO4GV | 8 | 61 | 2011-10-15 | 2013-10-16 | Available |
| KO4GW | 8 | 61 | 2001-08-06 | 2003-08-07 | Available |
| KO4GX | 8 | 63 | 1999-01-13 | 2001-01-14 | Available |
| KO4GY | 8 | 65 | — | — | Available |
| KO4GZ | 8 | 63 | 2022-10-13 | 2024-10-14 | Available |
| KO4HA | 9 | 55 | 2001-08-13 | 2003-08-14 | Available |
| KO4HB | 9 | 59 | 2001-08-13 | 2003-08-14 | Available |
| KO4HC | 9 | 61 | — | — | Available |
| KO4HD | 9 | 57 | — | — | Available |
| KO4HE | 9 | 51 | 2021-08-13 | 2023-08-14 | Available |
| KO4HF | 9 | 59 | 2031-10-01 | — | Active |
| KO4HG | 8 | 59 | 2031-08-13 | — | Active |
| KO4HH | 9 | 57 | 2031-08-20 | — | Active |
| KO4HI | 10 | 53 | — | — | Available |
| KO4HJ | 10 | 63 | — | — | Available |
| KO4HK | 9 | 59 | — | — | Available |
| KO4HL | 9 | 59 | 2012-02-25 | 2014-02-26 | Available |
| KO4HM | 8 | 57 | — | — | Available |
| KO4HN | 10 | 55 | — | — | Available |
| KO4HO | 9 | 61 | 2013-11-30 | 2015-12-01 | Available |
| KO4HP | 9 | 61 | — | — | Available |
| KO4HQ | 9 | 63 | 2002-06-22 | 2004-06-23 | Available |
| KO4HR | 10 | 57 | — | — | Available |
| KO4HS | 10 | 55 | — | — | Available |
| KO4HT | 9 | 53 | 2011-08-20 | 2013-08-21 | Available |
| KO4HU | 10 | 57 | 2033-07-19 | — | Active |
| KO4HV | 9 | 59 | — | — | Available |
| KO4HW | 9 | 59 | — | — | Available |
| KO4HX | 9 | 61 | 2031-08-20 | — | Active |
| KO4HY | 9 | 63 | — | — | Available |
| KO4HZ | 9 | 61 | 2021-08-20 | 2023-08-21 | Available |
| KO4IA | 10 | 51 | 2002-05-19 | 2004-05-20 | Available |
| KO4IB | 10 | 55 | 2021-08-27 | 2023-08-28 | Available |
| KO4IC | 10 | 57 | 2021-08-27 | 2023-08-28 | Available |
| KO4ID | 10 | 53 | 2027-09-29 | — | Active (Vanity) |
| KO4IE | 10 | 47 | 2032-09-15 | — | Active |
| KO4IF | 10 | 55 | 2022-05-31 | 2024-06-01 | Available |
| KO4IG | 9 | 55 | — | — | Available |
| KO4IH | 10 | 53 | 2014-01-31 | 2016-02-01 | Available |
| KO4II | 11 | 49 | 2021-08-27 | 2023-08-28 | Available |
| KO4IJ | 11 | 59 | 2001-08-27 | 2003-08-28 | Available |
| KO4IK | 10 | 55 | 2031-08-27 | — | Active |
| KO4IL | 10 | 55 | 2001-08-27 | 2003-08-28 | Available |
| KO4IM | 9 | 53 | 2031-08-27 | — | Active |
| KO4IN | 11 | 51 | 2030-09-14 | — | Active (Vanity) |
| KO4IO | 10 | 57 | 2033-11-16 | — | Active |
| KO4IP | 10 | 57 | 2001-07-16 | 2003-07-17 | Available |
| KO4IQ | 10 | 59 | 2034-12-27 | — | Active |
| KO4IR | 11 | 53 | 2021-08-27 | 2023-08-28 | Available |
| KO4IS | 11 | 51 | 2001-10-29 | 2003-10-30 | Available |
| KO4IT | 10 | 49 | 2011-08-27 | 2013-08-28 | Available |