| शहर/नगर वा प्रदेश | क्षेत्र कोड |
| 1. | Bangkok (Krung Thep Maha Nakhon), Nonthaburi, Pathum Thani, Samut Prakan, Phutthamonthon | 02 |
| 2. | Bueng Kan, Loei, Mukdahan, Nakhon Phanom, Nong Bua Lamphu, Nong Khai, Sakon Nakhon, Udon Thani | 042 |
| 3. | Buri Ram, Chaiyaphum, Nakhon Ratchasima, Surin | 044 |