+66-33-(000000...999999): Chacheongsao, Rayong and Chon Buri, Eastern Region Read more about +66-33-(000000...999999)
+66-34-(000000...999999): Nakhon Pathom, Samut Sakhon, Kanchanaburi and Samut Songkhram, Central Region Read more about +66-34-(000000...999999)
+66-35-(000000...999999): Phra Nakhon Si Ayutthaya, Suphan Buri and Ang Thong, Central Region Read more about +66-35-(000000...999999)
+66-36-(000000...999999): Saraburi, Lop Buri and Sing Buri, Central Region Read more about +66-36-(000000...999999)
+66-37-(000000...999999): Bangkok and vicinity: Nonthaburi, Pathum Thani and Samut Prakarn Read more about +66-37-(000000...999999)
+66-38-(000000...999999): Prachin Buri, Sa Kaeo and Nakhon Nayok, Eastern Region Read more about +66-38-(000000...999999)
+66-39-(000000...999999): Chanthaburi and Trat, Eastern Region Read more about +66-39-(000000...999999)
+66-42-(000000...999999): Udon Thani, Nong Bua Lamphu, Nong Khai, Nakhon Phanom, Mukdahan, Sakon Nakhon and Loei, North-Eastern Region Read more about +66-42-(000000...999999)
+66-43-(000000...999999): Khon Kaen, Roi Et, Maha Sarakham and Kalasin Read more about +66-43-(000000...999999)
+66-44-(000000...999999): Nakhon Ratchasima, Surin, Buriram and Chaiyaphum, North-Eastern Region Read more about +66-44-(000000...999999)
