| prefix | entity | cont | ITU zone | CQ zone | GL |
| 1S, 9M0 | Spratly Is. | AS | 50 | 26 | OK70 |
| 3W, XV | Viet Nam | AS | 49 | 26 | OL20 |
| HS, E2 | Thailand | AS | 49 | 26 | OK03 |
| VU4 | Andaman & Nicobar Is. | AS | 49 | 26 | NK61 |
| XU | Cambodia | AS | 49 | 26 | OK21 |
| XW | Laos | AS | 49 | 26 | OK17 |
| XY-XZ | Myanmar | AS | 49 | 26 | NK86 |
| zone 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |