District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| AI4VW | 10 | 49 | 2034-09-07 | — | Active |
| AI4VX | 10 | 51 | 2034-11-19 | — | Active (Vanity) |
| AI4VY | 10 | 53 | 2007-03-30 | 2009-03-31 | Available |
| AI4VZ | 10 | 51 | 2027-03-27 | — | Active |
| AI4WA | 10 | 45 | 2035-03-11 | — | Active (Vanity) |
| AI4WB | 10 | 49 | 2009-03-17 | 2011-03-18 | Available |
| AI4WC | 10 | 51 | 2024-03-05 | 2026-03-06 | Available |
| AI4WD | 10 | 47 | 2036-03-11 | — | Active (Vanity) |
| AI4WE | 10 | 41 | 2026-07-26 | — | Active |
| AI4WF | 10 | 49 | 2032-06-30 | — | Active |
| AI4WG | 9 | 49 | 2031-04-05 | — | Active |
| AI4WH | 10 | 47 | 2036-05-05 | — | Active |
| AI4WI | 11 | 43 | 2018-10-16 | 2020-10-17 | Available |
| AI4WJ | 11 | 53 | 2034-12-29 | — | Active |
| AI4WK | 10 | 49 | 2007-04-24 | 2009-04-25 | Available |
| AI4WL | 10 | 49 | 2036-02-21 | — | Active |
| AI4WM | 9 | 47 | 2036-11-14 | — | Active (Vanity) |
| AI4WN | 11 | 45 | 2027-04-09 | — | Active |
| AI4WO | 10 | 51 | 2028-08-31 | — | Active (Vanity) |
| AI4WP | 10 | 51 | 2028-04-22 | — | Active |
| AI4WQ | 10 | 53 | 2008-04-05 | 2010-04-06 | Available |
| AI4WR | 11 | 47 | 2007-05-05 | 2009-05-06 | Available |
| AI4WS | 11 | 45 | 2032-11-29 | — | Active |
| AI4WT | 10 | 43 | 2034-08-27 | — | Active |
| AI4WU | 11 | 47 | 2031-12-31 | — | Active |
| AI4WV | 10 | 49 | 2035-03-15 | — | Active |
| AI4WW | 10 | 49 | 2037-01-16 | — | Active |
| AI4WX | 10 | 51 | 2026-01-23 | 2028-01-24 | Canceled (grace period) |
| AI4WY | 10 | 53 | 2036-09-14 | — | Active |
| AI4WZ | 10 | 51 | 2035-06-22 | — | Active |
| AI4XA | 10 | 47 | 2007-05-08 | 2009-05-09 | Available |
| AI4XB | 10 | 51 | 2027-02-14 | — | Active |
| AI4XC | 10 | 53 | 2028-02-27 | — | Active |
| AI4XD | 10 | 49 | 2027-04-21 | — | Active |
| AI4XE | 10 | 43 | 2007-05-08 | 2009-05-09 | Available |
| AI4XF | 10 | 51 | 2034-05-10 | — | Active |
| AI4XG | 9 | 51 | 2034-10-25 | — | Active |
| AI4XH | 10 | 49 | 2007-05-12 | 2009-05-13 | Available |
| AI4XI | 11 | 45 | 2034-03-16 | — | Active |
| AI4XJ | 11 | 55 | 2028-07-28 | — | Active |
| AI4XK | 10 | 51 | 2027-04-25 | — | Active |
| AI4XL | 10 | 51 | 2021-10-16 | 2023-10-17 | Available |
| AI4XM | 9 | 49 | 2027-04-25 | — | Active |
| AI4XN | 11 | 47 | 2017-04-25 | 2019-04-26 | Available |
| AI4XO | 10 | 53 | 2028-05-14 | — | Active |
| AI4XP | 10 | 53 | 2009-09-15 | 2011-09-16 | Available |
| AI4XQ | 10 | 55 | 2010-08-10 | 2012-08-11 | Available |
| AI4XR | 11 | 49 | 2007-06-02 | 2009-06-03 | Available |
| AI4XS | 11 | 47 | 2017-04-27 | 2019-04-28 | Available |
| AI4XT | 10 | 45 | 2007-05-30 | 2009-05-31 | Available |
| AI4XU | 11 | 49 | 2016-11-01 | 2018-11-02 | Available |
| AI4XV | 10 | 51 | 2027-04-30 | — | Active |
| AI4XW | 10 | 51 | 2007-05-04 | 2009-05-05 | Available |
| AI4XX | 10 | 53 | 2021-08-23 | 2023-08-24 | Available |
| AI4XY | 10 | 55 | 2033-03-28 | — | Active |
| AI4XZ | 10 | 53 | 2028-06-26 | — | Active |
| AI4YA | 10 | 49 | 2009-12-04 | 2011-12-05 | Available |
| AI4YB | 10 | 53 | 2027-05-08 | — | Active |
| AI4YC | 10 | 55 | 2027-05-09 | — | Active |
| AI4YD | 10 | 51 | 2019-02-14 | 2021-02-15 | Available |
| AI4YE | 10 | 45 | 2027-05-10 | — | Active |
| AI4YF | 10 | 53 | 2017-05-10 | 2019-05-11 | Available |
| AI4YG | 9 | 53 | 2027-05-10 | — | Active |
| AI4YH | 10 | 51 | 2027-05-10 | — | Active |
| AI4YI | 11 | 47 | 2027-05-10 | — | Active |
| AI4YJ | 11 | 57 | 2015-04-15 | 2017-04-16 | Available |
| AI4YK | 10 | 53 | 2027-04-17 | — | Active |
| AI4YL | 10 | 53 | 2018-01-03 | 2020-01-04 | Available |
| AI4YM | 9 | 51 | 2017-05-15 | 2019-05-16 | Available |
| AI4YN | 11 | 49 | 2027-02-07 | — | Active |
| AI4YO | 10 | 55 | 2032-02-01 | — | Active |
| AI4YP | 10 | 55 | 2015-07-24 | 2017-07-25 | Available |
| AI4YQ | 10 | 57 | 2023-04-13 | 2025-04-14 | Available |
| AI4YR | 11 | 51 | 2035-04-01 | — | Active |
| AI4YS | 11 | 49 | 2032-06-30 | — | Active |
| AI4YT | 10 | 47 | 2007-06-22 | 2009-06-23 | Available |
| AI4YU | 11 | 51 | 2007-07-12 | 2009-07-13 | Available |
| AI4YV | 10 | 53 | 2023-05-28 | 2025-05-29 | Available |
| AI4YW | 10 | 53 | 2022-06-01 | 2024-06-02 | Available |
| AI4YX | 10 | 55 | 2027-04-09 | — | Active |
| AI4YY | 10 | 57 | 2027-05-04 | — | Active |
| AI4YZ | 10 | 55 | 2027-06-07 | — | Active |
| AI4ZA | 10 | 47 | 2016-06-12 | 2018-06-13 | Available |
| AI4ZB | 10 | 51 | 2027-04-26 | — | Active |
| AI4ZC | 10 | 53 | 2026-07-06 | — | Active |
| AI4ZD | 10 | 49 | 2035-08-22 | — | Active (Vanity) |
| AI4ZE | 10 | 43 | 2007-08-21 | 2009-08-22 | Available |
| AI4ZF | 10 | 51 | 2008-03-11 | 2010-03-12 | Available |
| AI4ZG | 9 | 51 | 2007-08-24 | 2009-08-25 | Available |
| AI4ZH | 10 | 49 | 2031-10-05 | — | Active (Vanity) |
| AI4ZI | 11 | 45 | 2014-04-11 | 2016-04-12 | Available |
| AI4ZJ | 11 | 55 | 2017-05-16 | 2019-05-17 | Available |
| AI4ZK | 10 | 51 | 2027-04-18 | — | Active |
| AI4ZL | 10 | 51 | 2027-10-31 | — | Active |
| AI4ZM | 9 | 49 | 2027-06-20 | — | Active |
| AI4ZN | 11 | 47 | 2033-10-07 | — | Active |
| AI4ZO | 10 | 53 | 2017-06-22 | 2019-06-23 | Available |
| AI4ZP | 10 | 53 | 2027-06-27 | — | Active |
| AI4ZQ | 10 | 55 | 2035-10-14 | — | Active |
| AI4ZR | 11 | 49 | 2033-05-11 | — | Active |