District 4
1x3 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| N4UMC | 10 | 53 | 2031-03-26 | — | Active |
| N4UMD | 10 | 49 | 2028-12-02 | — | Active |
| N4UME | 10 | 43 | 2013-12-27 | 2015-12-28 | Available |
| N4UMF | 10 | 51 | 2018-08-13 | 2020-08-14 | Available |
| N4UMG | 9 | 51 | 1998-12-06 | 2000-12-07 | Available |
| N4UMH | 10 | 49 | 2016-02-23 | 2018-02-24 | Available |
| N4UMI | 11 | 45 | 2030-04-28 | — | Active |
| N4UMJ | 11 | 55 | 2021-01-01 | 2023-01-02 | Available |
| N4UMK | 10 | 51 | — | — | Available |
| N4UML | 10 | 51 | — | — | Available |
| N4UMM | 9 | 49 | 2029-07-06 | — | Active (Vanity) |
| N4UMN | 11 | 47 | 2008-08-27 | 2010-08-28 | Available |
| N4UMO | 10 | 53 | 1998-12-13 | 2000-12-14 | Available |
| N4UMP | 10 | 53 | — | — | Available |
| N4UMQ | 10 | 55 | 2018-10-20 | 2020-10-21 | Available |
| N4UMR | 11 | 49 | 2020-02-27 | 2022-02-28 | Available |
| N4UMS | 11 | 47 | 2029-03-08 | — | Active |
| N4UMT | 10 | 45 | — | — | Available |
| N4UMU | 11 | 49 | 1998-12-13 | 2000-12-14 | Available |
| N4UMV | 10 | 51 | 1998-12-13 | 2000-12-14 | Available |
| N4UMW | 10 | 51 | 2029-01-22 | — | Active |
| N4UMX | 10 | 53 | 1998-12-13 | 2000-12-14 | Available |
| N4UMY | 10 | 55 | 2004-11-09 | 2006-11-10 | Available |
| N4UMZ | 10 | 53 | 1999-01-31 | 2001-02-01 | Available |
| N4UNA | 12 | 45 | 2008-08-17 | 2010-08-18 | Available |
| N4UNB | 12 | 49 | 2019-04-30 | 2021-05-01 | Available |
| N4UNC | 12 | 51 | 2030-01-09 | — | Active |
| N4UND | 12 | 47 | — | — | Available |
| N4UNE | 12 | 41 | 2028-09-10 | — | Active |
| N4UNF | 12 | 49 | 2035-03-10 | — | Active (Vanity) |
| N4UNG | 11 | 49 | 2036-09-15 | — | Active (Vanity) |
| N4UNH | 12 | 47 | 2018-04-14 | 2020-04-15 | Available |
| N4UNI | 13 | 43 | 1998-12-13 | 2000-12-14 | Available |
| N4UNJ | 13 | 53 | 2009-04-01 | 2011-04-02 | Available |
| N4UNK | 12 | 49 | 2033-10-05 | — | Active |
| N4UNL | 12 | 49 | — | — | Available |
| N4UNM | 11 | 47 | 2033-03-30 | — | Active |
| N4UNN | 13 | 45 | 2028-09-28 | — | Active |
| N4UNO | 12 | 51 | 2027-04-15 | — | Active (Vanity) |
| N4UNP | 12 | 51 | 2028-11-21 | — | Active |
| N4UNQ | 12 | 53 | 1998-12-13 | 2000-12-14 | Available |
| N4UNR | 13 | 47 | 2032-04-26 | — | Active (Vanity) |
| N4UNS | 13 | 45 | 2003-06-22 | 2005-06-23 | Available |
| N4UNT | 12 | 43 | 2019-03-20 | 2021-03-21 | Available |
| N4UNU | 13 | 47 | 2004-03-29 | 2006-03-30 | Available |
| N4UNV | 12 | 49 | 2008-10-28 | 2010-10-29 | Available |
| N4UNW | 12 | 49 | 1998-12-20 | 2000-12-21 | Available |
| N4UNX | 12 | 51 | 2034-12-24 | — | Active |
| N4UNY | 12 | 53 | 2033-01-08 | — | Active |
| N4UNZ | 12 | 51 | 2023-09-21 | 2025-09-22 | Available |
| N4UOA | 11 | 51 | 2015-08-23 | 2017-08-24 | Available |
| N4UOB | 11 | 55 | 2029-01-08 | — | Active |
| N4UOC | 11 | 57 | — | — | Available |
| N4UOD | 11 | 53 | 2029-01-06 | — | Active |
| N4UOE | 11 | 47 | — | — | Available |
| N4UOF | 11 | 55 | — | — | Available |
| N4UOG | 10 | 55 | 2024-04-19 | 2026-04-20 | Available |
| N4UOH | 11 | 53 | 2034-03-22 | — | Active |
| N4UOI | 12 | 49 | — | — | Available |
| N4UOJ | 12 | 59 | 2029-03-17 | — | Active |
| N4UOK | 11 | 55 | 2022-10-13 | 2024-10-14 | Available |
| N4UOL | 11 | 55 | 1998-12-20 | 2000-12-21 | Available |
| N4UOM | 10 | 53 | 2032-05-04 | — | Active |
| N4UON | 12 | 51 | 2021-08-13 | 2023-08-14 | Available |
| N4UOO | 11 | 57 | 2028-11-20 | — | Active |
| N4UOP | 11 | 57 | — | — | Available |
| N4UOQ | 11 | 59 | 2031-07-22 | — | Active |
| N4UOR | 12 | 53 | 2019-01-03 | 2021-01-04 | Available |
| N4UOS | 12 | 51 | 2019-04-21 | 2021-04-22 | Available |
| N4UOT | 11 | 49 | 2007-10-19 | 2009-10-20 | Available |
| N4UOU | 12 | 53 | 2028-08-24 | — | Active |
| N4UOV | 11 | 55 | 2020-08-21 | 2022-08-22 | Available |
| N4UOW | 11 | 55 | 2002-06-16 | 2004-06-17 | Available |
| N4UOX | 11 | 57 | — | — | Available |
| N4UOY | 11 | 59 | 1998-12-20 | 2000-12-21 | Available |
| N4UOZ | 11 | 57 | 2032-09-29 | — | Active |
| N4UPA | 11 | 51 | 1998-12-20 | 2000-12-21 | Available |
| N4UPB | 11 | 55 | 2018-09-01 | 2020-09-02 | Available |
| N4UPC | 11 | 57 | 2030-03-07 | — | Active (Vanity) |
| N4UPD | 11 | 53 | 2028-10-23 | — | Active |
| N4UPE | 11 | 47 | 2029-05-19 | — | Active |
| N4UPF | 11 | 55 | 2018-10-03 | 2020-10-04 | Available |
| N4UPG | 10 | 55 | 2032-05-09 | — | Active (Vanity) |
| N4UPH | 11 | 53 | 2023-06-01 | 2025-06-02 | Available |
| N4UPI | 12 | 49 | 2008-11-16 | 2010-11-17 | Available |
| N4UPJ | 12 | 59 | 2007-08-24 | 2009-08-25 | Available |
| N4UPK | 11 | 55 | 2008-09-08 | 2010-09-09 | Available |
| N4UPL | 11 | 55 | 1998-12-27 | 2000-12-28 | Available |
| N4UPM | 10 | 53 | 1998-12-27 | 2000-12-28 | Available |
| N4UPN | 12 | 51 | 2011-01-05 | 2013-01-06 | Available |
| N4UPO | 11 | 57 | — | — | Available |
| N4UPP | 11 | 57 | 1998-12-27 | 2000-12-28 | Available |
| N4UPQ | 11 | 59 | 2004-07-20 | 2006-07-21 | Available |
| N4UPR | 12 | 53 | 1998-12-27 | 2000-12-28 | Available |
| N4UPS | 12 | 51 | 2028-10-20 | — | Active |
| N4UPT | 11 | 49 | 1998-12-27 | 2000-12-28 | Available |
| N4UPU | 12 | 53 | 1999-06-06 | 2001-06-07 | Available |
| N4UPV | 11 | 55 | 1998-12-27 | 2000-12-28 | Available |
| N4UPW | 11 | 55 | 1998-12-27 | 2000-12-28 | Available |
| N4UPX | 11 | 57 | 2033-06-22 | — | Active (Vanity) |