District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AI4GM | 8 | 47 | 2032-05-04 | — | Active (Vanity) |
| AI4GN | 10 | 45 | 2009-07-17 | 2011-07-18 | Available |
| AI4GO | 9 | 51 | 2030-08-15 | — | Active |
| AI4GP | 9 | 51 | 2029-05-05 | — | Active |
| AI4GQ | 9 | 53 | 2014-02-12 | 2016-02-13 | Available |
| AI4GR | 10 | 47 | 2034-05-26 | — | Active |
| AI4GS | 10 | 45 | 2007-09-08 | 2009-09-09 | Available |
| AI4GT | 9 | 43 | 2034-02-23 | — | Active |
| AI4GU | 10 | 47 | 2023-01-04 | 2025-01-05 | Available |
| AI4GV | 9 | 49 | 2029-09-08 | — | Active |
| AI4GW | 9 | 49 | 2013-05-11 | 2015-05-12 | Available |
| AI4GX | 9 | 51 | 2034-01-27 | — | Active |
| AI4GY | 9 | 53 | 2035-08-31 | — | Active |
| AI4GZ | 9 | 51 | 2034-09-04 | — | Active |
| AI4HA | 10 | 43 | 2024-09-14 | 2026-09-15 | Available |
| AI4HB | 10 | 47 | 2017-03-27 | 2019-03-28 | Available |
| AI4HC | 10 | 49 | 2021-05-19 | 2023-05-20 | Available |
| AI4HD | 10 | 45 | 2004-10-08 | 2006-10-09 | Available |
| AI4HE | 10 | 39 | 2004-10-13 | 2006-10-14 | Available |
| AI4HF | 10 | 47 | 2022-03-11 | 2024-03-12 | Available |
| AI4HG | 9 | 47 | 2006-06-27 | 2008-06-28 | Available |
| AI4HH | 10 | 45 | 2028-12-22 | — | Active |
| AI4HI | 11 | 41 | 2004-10-13 | 2006-10-14 | Available |
| AI4HJ | 11 | 51 | 2033-07-28 | — | Active |
| AI4HK | 10 | 47 | 2034-05-16 | — | Active |
| AI4HL | 10 | 47 | 2028-01-15 | — | Active |
| AI4HM | 9 | 45 | 2004-10-07 | 2006-10-08 | Available |
| AI4HN | 11 | 43 | 2016-11-04 | 2018-11-05 | Available |
| AI4HO | 10 | 49 | 2032-04-28 | — | Active (Vanity) |
| AI4HP | 10 | 49 | 2024-05-10 | 2026-05-11 | Available |
| AI4HQ | 10 | 51 | 2005-03-22 | 2007-03-23 | Available |
| AI4HR | 11 | 45 | 2035-05-08 | — | Active |
| AI4HS | 11 | 43 | 2016-04-08 | 2018-04-09 | Available |
| AI4HT | 10 | 41 | 2008-06-20 | 2010-06-21 | Available |
| AI4HU | 11 | 45 | 2034-11-19 | — | Active |
| AI4HV | 10 | 47 | 2034-07-17 | — | Active |
| AI4HW | 10 | 47 | 2029-12-27 | — | Active |
| AI4HX | 10 | 49 | 2005-09-02 | 2007-09-03 | Available |
| AI4HY | 10 | 51 | 2009-11-07 | 2011-11-08 | Available |
| AI4HZ | 10 | 49 | 2036-05-14 | — | Active |
| AI4IA | 11 | 39 | 2024-03-05 | 2026-03-06 | Available |
| AI4IB | 11 | 43 | 2005-01-14 | 2007-01-15 | Available |
| AI4IC | 11 | 45 | 2034-05-02 | — | Active |
| AI4ID | 11 | 41 | 2035-09-19 | — | Active |
| AI4IE | 11 | 35 | 2025-01-07 | 2027-01-08 | Canceled (grace period) |
| AI4IF | 11 | 43 | 2033-11-20 | — | Active |
| AI4IG | 10 | 43 | 2033-06-26 | — | Active |
| AI4IH | 11 | 41 | 2004-12-29 | 2006-12-30 | Available |
| AI4II | 12 | 37 | 2035-10-20 | — | Active (Vanity) |
| AI4IJ | 12 | 47 | 2034-01-05 | — | Active |
| AI4IK | 11 | 43 | 2006-07-25 | 2008-07-26 | Available |
| AI4IL | 11 | 43 | 2034-09-23 | — | Active |
| AI4IM | 10 | 41 | 2035-01-10 | — | Active |
| AI4IN | 12 | 39 | 2035-01-11 | — | Active |
| AI4IO | 11 | 45 | 2034-10-12 | — | Active |
| AI4IP | 11 | 45 | 2033-05-29 | — | Active |
| AI4IQ | 11 | 47 | 2034-10-29 | — | Active |
| AI4IR | 12 | 41 | 2027-12-18 | — | Active |
| AI4IS | 12 | 39 | 2034-11-15 | — | Active |
| AI4IT | 11 | 37 | 2036-04-26 | — | Active (Vanity) |
| AI4IU | 12 | 41 | — | — | Available |
| AI4IV | 11 | 43 | 2034-06-10 | — | Active |
| AI4IW | 11 | 43 | 2005-03-02 | 2007-03-03 | Available |
| AI4IX | 11 | 45 | 2034-01-25 | — | Active |
| AI4IY | 11 | 47 | 2020-01-04 | 2022-01-05 | Available |
| AI4IZ | 11 | 45 | 2024-12-23 | — | Active |
| AI4JA | 11 | 49 | 2027-03-05 | — | Active |
| AI4JB | 11 | 53 | 2005-03-15 | 2007-03-16 | Available |
| AI4JC | 11 | 55 | 2036-09-11 | — | Active (Vanity) |
| AI4JD | 11 | 51 | 2033-08-01 | — | Active |
| AI4JE | 11 | 45 | 2024-03-05 | 2026-03-06 | Available |
| AI4JF | 11 | 53 | 2025-02-24 | — | Active |
| AI4JG | 10 | 53 | 2005-03-18 | 2007-03-19 | Available |
| AI4JH | 11 | 51 | 2011-10-29 | 2013-10-30 | Available |
| AI4JI | 12 | 47 | 2035-09-22 | — | Active |
| AI4JJ | 12 | 57 | 2025-01-10 | — | Active |
| AI4JK | 11 | 53 | 2035-02-07 | — | Active |
| AI4JL | 11 | 53 | 2034-10-24 | — | Active |
| AI4JM | 10 | 51 | 2005-05-10 | 2007-05-11 | Available |
| AI4JN | 12 | 49 | 2034-02-06 | — | Active |
| AI4JO | 11 | 55 | 2005-04-22 | 2007-04-23 | Available |
| AI4JP | 11 | 55 | 2005-04-08 | 2007-04-09 | Available |
| AI4JQ | 11 | 57 | 2005-04-08 | 2007-04-09 | Available |
| AI4JR | 12 | 51 | 2005-04-12 | 2007-04-13 | Available |
| AI4JS | 12 | 49 | 2005-04-22 | 2007-04-23 | Available |
| AI4JT | 11 | 47 | 2029-03-31 | — | Active (Vanity) |
| AI4JU | 12 | 51 | 2028-04-16 | — | Active |
| AI4JV | 11 | 53 | 2024-11-10 | — | Active |
| AI4JW | 11 | 53 | 2034-09-07 | — | Active (Vanity) |
| AI4JX | 11 | 55 | 2005-04-26 | 2007-04-27 | Available |
| AI4JY | 11 | 57 | 2031-06-15 | — | Active |
| AI4JZ | 11 | 55 | 2005-04-26 | 2007-04-27 | Available |
| AI4KA | 10 | 45 | 2034-10-08 | — | Active |
| AI4KB | 10 | 49 | 2026-08-26 | — | Active |
| AI4KC | 10 | 51 | 2005-06-14 | 2007-06-15 | Available |
| AI4KD | 10 | 47 | 2036-01-12 | — | Active |
| AI4KE | 10 | 41 | 2009-09-18 | 2011-09-19 | Available |
| AI4KF | 10 | 49 | 2010-12-21 | 2012-12-22 | Available |
| AI4KG | 9 | 49 | 2031-05-23 | — | Active |
| AI4KH | 10 | 47 | 2028-07-06 | — | Active |