ITU zones index
| 4W | Timor-Leste | OC | 54 | 28 | PI21 |
| 9M2,4 | West Malaysia | AS | 54 | 28 | OJ03 |
| 9M6,8 | East Malaysia | OC | 54 | 28 | OJ85 |
| 9V | Singapore | AS | 54 | 28 | OJ11 |
| V8 | Brunei | OC | 54 | 28 | OJ74 |
| VK9C | Cocos-Keeling Is. | OC | 54 | 29 | NH87,88 |
| VK9X | Christmas I. | OC | 54 | 29 | OH29 |
| YB-YH | Indonesia | OC | 51,54 | 28 | OI33 |
| prefix | entity | continent | ITU zone | CQ zone | GL |