| HS0, HS1, E20, E21 |
Central region (e.g. Bangkok) |
| HS2, E22 |
Eastern region (e.g. Pattaya) |
| HS3, HS4, E23, E24 |
Northeastern region (e.g. Korat, U-dornthani) |
| HS5, E25 |
Northern region (e.g. Chieng Mai, Chieng Rai) |
| HS6, E26 |
Lower Northern region |
| HS7, E27 |
Western region (e.g. Karnchanaburi) |
| HS8, HS9, E28, E29 |
Southern region (e.g. Phuket) |
| suffix AA-AZ |
Club station and Net Control Station for the province |
| suffix BA-ZZ |
Personal station |
| suffix AAA-ZZZ |
Personal station |
| HS0ZAA-HS0ZZZ |
Foreign amateurs operating with reciprocal licence |