District 4
2x2 Callsigns (100)
| Callsign | Phonetic | Morse | End Date | Available Date | Status |
|---|---|---|---|---|---|
| NU4AA | 11 | 45 | — | — | Available |
| NU4AB | 11 | 49 | — | — | Available |
| NU4AC | 11 | 51 | — | — | Available |
| NU4AD | 11 | 47 | — | — | Available |
| NU4AE | 11 | 41 | — | — | Available |
| NU4AF | 11 | 49 | — | — | Available |
| NU4AG | 10 | 49 | — | — | Available |
| NU4AH | 11 | 47 | — | — | Available |
| NU4AI | 12 | 43 | — | — | Available |
| NU4AJ | 12 | 53 | — | — | Available |
| NU4AK | 11 | 49 | — | — | Available |
| NU4AL | 11 | 49 | — | — | Available |
| NU4AM | 10 | 47 | — | — | Available |
| NU4AN | 12 | 45 | — | — | Available |
| NU4AO | 11 | 51 | — | — | Available |
| NU4AP | 11 | 51 | — | — | Available |
| NU4AQ | 11 | 53 | — | — | Available |
| NU4AR | 12 | 47 | — | — | Available |
| NU4AS | 12 | 45 | — | — | Available |
| NU4AT | 11 | 43 | — | — | Available |
| NU4AU | 12 | 47 | — | — | Available |
| NU4AV | 11 | 49 | — | — | Available |
| NU4AW | 11 | 49 | — | — | Available |
| NU4AX | 11 | 51 | — | — | Available |
| NU4AY | 11 | 53 | — | — | Available |
| NU4AZ | 11 | 51 | — | — | Available |
| NU4BA | 11 | 49 | — | — | Available |
| NU4BB | 11 | 53 | — | — | Available |
| NU4BC | 11 | 55 | — | — | Available |
| NU4BD | 11 | 51 | — | — | Available |
| NU4BE | 11 | 45 | — | — | Available |
| NU4BF | 11 | 53 | — | — | Available |
| NU4BG | 10 | 53 | — | — | Available |
| NU4BH | 11 | 51 | — | — | Available |
| NU4BI | 12 | 47 | — | — | Available |
| NU4BJ | 12 | 57 | — | — | Available |
| NU4BK | 11 | 53 | — | — | Available |
| NU4BL | 11 | 53 | — | — | Available |
| NU4BM | 10 | 51 | — | — | Available |
| NU4BN | 12 | 49 | — | — | Available |
| NU4BO | 11 | 55 | — | — | Available |
| NU4BP | 11 | 55 | 2004-06-16 | 2006-06-17 | Available |
| NU4BQ | 11 | 57 | — | — | Available |
| NU4BR | 12 | 51 | — | — | Available |
| NU4BS | 12 | 49 | — | — | Available |
| NU4BT | 11 | 47 | — | — | Available |
| NU4BU | 12 | 51 | — | — | Available |
| NU4BV | 11 | 53 | — | — | Available |
| NU4BW | 11 | 53 | — | — | Available |
| NU4BX | 11 | 55 | — | — | Available |
| NU4BY | 11 | 57 | — | — | Available |
| NU4BZ | 11 | 55 | — | — | Available |
| NU4CA | 11 | 51 | — | — | Available |
| NU4CB | 11 | 55 | — | — | Available |
| NU4CC | 11 | 57 | — | — | Available |
| NU4CD | 11 | 53 | — | — | Available |
| NU4CE | 11 | 47 | — | — | Available |
| NU4CF | 11 | 55 | — | — | Available |
| NU4CG | 10 | 55 | — | — | Available |
| NU4CH | 11 | 53 | — | — | Available |
| NU4CI | 12 | 49 | — | — | Available |
| NU4CJ | 12 | 59 | — | — | Available |
| NU4CK | 11 | 55 | — | — | Available |
| NU4CL | 11 | 55 | — | — | Available |
| NU4CM | 10 | 53 | — | — | Available |
| NU4CN | 12 | 51 | — | — | Available |
| NU4CO | 11 | 57 | — | — | Available |
| NU4CP | 11 | 57 | — | — | Available |
| NU4CQ | 11 | 59 | — | — | Available |
| NU4CR | 12 | 53 | — | — | Available |
| NU4CS | 12 | 51 | — | — | Available |
| NU4CT | 11 | 49 | — | — | Available |
| NU4CU | 12 | 53 | — | — | Available |
| NU4CV | 11 | 55 | — | — | Available |
| NU4CW | 11 | 55 | — | — | Available |
| NU4CX | 11 | 57 | — | — | Available |
| NU4CY | 11 | 59 | — | — | Available |
| NU4CZ | 11 | 57 | — | — | Available |
| NU4DA | 11 | 47 | — | — | Available |
| NU4DB | 11 | 51 | — | — | Available |
| NU4DC | 11 | 53 | — | — | Available |
| NU4DD | 11 | 49 | — | — | Available |
| NU4DE | 11 | 43 | 2027-02-04 | — | Active (Vanity) |
| NU4DF | 11 | 51 | — | — | Available |
| NU4DG | 10 | 51 | — | — | Available |
| NU4DH | 11 | 49 | — | — | Available |
| NU4DI | 12 | 45 | — | — | Available |
| NU4DJ | 12 | 55 | — | — | Available |
| NU4DK | 11 | 51 | — | — | Available |
| NU4DL | 11 | 51 | — | — | Available |
| NU4DM | 10 | 49 | — | — | Available |
| NU4DN | 12 | 47 | — | — | Available |
| NU4DO | 11 | 53 | 2033-05-23 | — | Active (Vanity) |
| NU4DP | 11 | 53 | — | — | Available |
| NU4DQ | 11 | 55 | — | — | Available |
| NU4DR | 12 | 49 | — | — | Available |
| NU4DS | 12 | 47 | — | — | Available |
| NU4DT | 11 | 45 | — | — | Available |
| NU4DU | 12 | 49 | — | — | Available |
| NU4DV | 11 | 51 | — | — | Available |