District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AI4KI | 11 | 43 | 2034-06-22 | — | Active |
| AI4KJ | 11 | 53 | 2035-03-30 | — | Active |
| AI4KK | 10 | 49 | 2033-05-10 | — | Active |
| AI4KL | 10 | 49 | 2030-11-19 | — | Active |
| AI4KM | 9 | 47 | 2033-09-08 | — | Active |
| AI4KN | 11 | 45 | 2025-04-18 | — | Active |
| AI4KO | 10 | 51 | 2011-06-13 | 2013-06-14 | Available |
| AI4KP | 10 | 51 | 2015-01-26 | 2017-01-27 | Available |
| AI4KQ | 10 | 53 | 2035-01-10 | — | Active |
| AI4KR | 11 | 47 | 2016-08-19 | 2018-08-20 | Available |
| AI4KS | 11 | 45 | 2006-02-07 | 2008-02-08 | Available |
| AI4KT | 10 | 43 | 2010-07-16 | 2012-07-17 | Available |
| AI4KU | 11 | 47 | 2027-03-14 | — | Active |
| AI4KV | 10 | 49 | 2025-06-03 | — | Active |
| AI4KW | 10 | 49 | 2024-09-07 | 2026-09-08 | Available |
| AI4KX | 10 | 51 | 2035-05-17 | — | Active |
| AI4KY | 10 | 53 | 2032-03-03 | — | Active |
| AI4KZ | 10 | 51 | 2021-04-27 | 2023-04-28 | Available |
| AI4LA | 10 | 45 | 2025-05-31 | — | Active |
| AI4LB | 10 | 49 | 2022-09-19 | 2024-09-20 | Available |
| AI4LC | 10 | 51 | 2013-07-30 | 2015-07-31 | Available |
| AI4LD | 10 | 47 | 2018-12-31 | 2021-01-01 | Available |
| AI4LE | 10 | 41 | 2025-04-29 | — | Active |
| AI4LF | 10 | 49 | 2006-01-06 | 2008-01-07 | Available |
| AI4LG | 9 | 49 | 2008-11-25 | 2010-11-26 | Available |
| AI4LH | 10 | 47 | 2025-03-14 | — | Active |
| AI4LI | 11 | 43 | 2006-11-14 | 2008-11-15 | Available |
| AI4LJ | 11 | 53 | 2005-08-12 | 2007-08-13 | Available |
| AI4LK | 10 | 49 | 2015-01-28 | 2017-01-29 | Available |
| AI4LL | 10 | 49 | 2034-07-14 | — | Active |
| AI4LM | 9 | 47 | 2035-01-07 | — | Active |
| AI4LN | 11 | 45 | 2006-07-25 | 2008-07-26 | Available |
| AI4LO | 10 | 51 | 2005-08-05 | 2007-08-06 | Available |
| AI4LP | 10 | 51 | 2005-08-09 | 2007-08-10 | Available |
| AI4LQ | 10 | 53 | 2005-08-10 | 2007-08-11 | Available |
| AI4LR | 11 | 47 | 2024-05-04 | 2026-05-05 | Available |
| AI4LS | 11 | 45 | 2030-05-02 | — | Active |
| AI4LT | 10 | 43 | 2035-08-15 | — | Active |
| AI4LU | 11 | 47 | 2035-08-17 | — | Active |
| AI4LV | 10 | 49 | 2036-06-26 | — | Active |
| AI4LW | 10 | 49 | 2033-10-27 | — | Active |
| AI4LX | 10 | 51 | 2035-08-23 | — | Active |
| AI4LY | 10 | 53 | 2014-05-20 | 2016-05-21 | Available |
| AI4LZ | 10 | 51 | 2025-04-20 | — | Active |
| AI4MA | 9 | 43 | 2006-01-07 | 2008-01-08 | Available |
| AI4MB | 9 | 47 | 2035-01-18 | — | Active |
| AI4MC | 9 | 49 | 2033-02-07 | — | Active |
| AI4MD | 9 | 45 | 2032-02-26 | — | Active (Vanity) |
| AI4ME | 9 | 39 | 2029-04-02 | — | Active (Vanity) |
| AI4MF | 9 | 47 | — | — | Available |
| AI4MG | 8 | 47 | 2006-01-07 | 2008-01-08 | Available |
| AI4MH | 9 | 45 | 2035-07-13 | — | Active |
| AI4MI | 10 | 41 | 2035-05-23 | — | Active |
| AI4MJ | 10 | 51 | 2025-09-30 | — | Active |
| AI4MK | 9 | 47 | 2006-04-15 | 2008-04-16 | Available |
| AI4ML | 9 | 47 | 2031-04-03 | — | Active (Vanity) |
| AI4MM | 8 | 45 | 2033-10-03 | — | Active (Vanity) |
| AI4MN | 10 | 43 | 2006-01-10 | 2008-01-11 | Available |
| AI4MO | 9 | 49 | 2033-05-23 | — | Active |
| AI4MP | 9 | 49 | 2025-09-30 | — | Active |
| AI4MQ | 9 | 51 | 2024-12-10 | — | Active |
| AI4MR | 10 | 45 | 2025-10-25 | — | Active |
| AI4MS | 10 | 43 | 2023-09-28 | 2025-09-29 | Available |
| AI4MT | 9 | 41 | 2007-10-02 | 2009-10-03 | Available |
| AI4MU | 10 | 45 | 2034-12-20 | — | Active |
| AI4MV | 9 | 47 | 2025-11-28 | — | Active |
| AI4MW | 9 | 47 | 2032-08-11 | — | Active |
| AI4MX | 9 | 49 | 2006-03-31 | 2008-04-01 | Available |
| AI4MY | 9 | 51 | 2035-10-25 | — | Active |
| AI4MZ | 9 | 49 | 2026-07-11 | — | Active |
| AI4NA | 11 | 41 | 2025-08-17 | — | Active |
| AI4NB | 11 | 45 | 2025-12-06 | — | Active |
| AI4NC | 11 | 47 | 2025-10-05 | — | Active |
| AI4ND | 11 | 43 | 2036-02-12 | — | Active |
| AI4NE | 11 | 37 | 2026-02-21 | — | Active |
| AI4NF | 11 | 45 | 2034-10-12 | — | Active |
| AI4NG | 10 | 45 | 2022-04-14 | 2024-04-15 | Available |
| AI4NH | 11 | 43 | 2006-01-10 | 2008-01-11 | Available |
| AI4NI | 12 | 39 | 2031-06-18 | — | Active |
| AI4NJ | 12 | 49 | 2035-04-09 | — | Active |
| AI4NK | 11 | 45 | 2008-09-03 | 2010-09-04 | Available |
| AI4NL | 11 | 45 | 2025-12-29 | — | Active |
| AI4NM | 10 | 43 | 2015-10-25 | 2017-10-26 | Available |
| AI4NN | 12 | 41 | 2026-08-28 | — | Active |
| AI4NO | 11 | 47 | 2006-01-31 | 2008-02-01 | Available |
| AI4NP | 11 | 47 | 2036-07-23 | — | Active |
| AI4NQ | 11 | 49 | 2007-01-04 | 2009-01-05 | Available |
| AI4NR | 12 | 43 | 2025-11-09 | — | Active |
| AI4NS | 12 | 41 | 2035-02-01 | — | Active |
| AI4NT | 11 | 39 | 2006-02-10 | 2008-02-11 | Available |
| AI4NU | 12 | 43 | 2008-03-08 | 2010-03-09 | Available |
| AI4NV | 11 | 45 | 2033-06-01 | — | Active |
| AI4NW | 11 | 45 | 2034-07-15 | — | Active |
| AI4NX | 11 | 47 | 2016-02-07 | 2018-02-08 | Available |
| AI4NY | 11 | 49 | 2035-12-01 | — | Active |
| AI4NZ | 11 | 47 | 2035-06-07 | — | Active |
| AI4OA | 10 | 47 | 2006-03-14 | 2008-03-15 | Available |
| AI4OB | 10 | 51 | 2034-06-29 | — | Active |
| AI4OC | 10 | 53 | — | — | Available |
| AI4OD | 10 | 49 | 2015-08-04 | 2017-08-05 | Available |