| Hammaps > CQ zones > 28 | Indonesian Zone |
| prefix | entity | continent | ITU zone | CQ zone | GL |
| 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 |
| H4 | Solomon Is. | OC | 51 | 28 | QI90 |
| P2 | Papua New Guinea | OC | 51 | 28 | QI30 |
| V8 | Brunei Darussalam | OC | 54 | 28 | OJ74 |
| YB-YH | Indonesia | OC | 51, 54 | 28 | OI33 |