The Area Codes of Thailand:
| City/Town or Region | Area code |
1. | Chachoengsao, Chon Buri, Rayong | 038 |
2. | Chai Nat, Nakhon Sawan, Phetchabun, Phichit, Uthai Thani | 056 |
3. | Chanthaburi, Trat | 039 |
4. | Chiang Mai, Chiang Rai, Lamphun, Mae Hong Son | 052 |
5. | Chiang Mai, Chiang Rai, Lamphun, Mae Hong Son | 053 |
6. | Chumphon, Ranong, Surat Thani | 077 |