Each region uses a code number. Most use 2 digits, some areas use 3 digits, appending the word

THAILAND

Bangkok 01

Chainat 10

Singburi 11

Lopburi 12

Ang Thong 13

Saraburi 14

Phra Nakhon Si Ayutthaya 15

Pathum Thani 16

Nonthaburi 17

Samut Prakan 18

Nakhon Nayok 20

Prachinburi 21

Chachoengsao 22

Chonburi 23

Rayong 24

Chanthaburi 25

Trat 26

Sa Kaeo 27

Chaiyaphum 30

Yasothon 31

Ubon Ratchathani 32

Sisaket 33

Buriram 34

Nakhon Ratchasima 35

Surin 36

Amnat Charoen 37

Nong Bua Lamphu 401

Bueng Kan 402

Nong Khai 40

Loei 41

Udon Thani 42

Nakhon Phanom 43

Sakon Nakhon 44

Khon Kaen 45

Kalasin 46

Maha Sarakham 47

Roi Et 48

Mukdahan 49

Chiang Rai 50

Mae Hong Son 51

Chiang Mai 52

Phayao 53

Nan 54

Lamphun 55

Lampang 56

Phrae 57

Uttaradit 60

Sukhothai 61

Tak 62

Phitsanulok 63

Kamphaeng Phet 64

Phichit 65

Phetchabun 66

Nakhon Sawan 67

Uthai Thani 68

Suphanburi 70

Kanchanaburi 71

Nakhon Pathom 72

Ratchaburi 73

Samut Sakhon 74

Samut Songkhram 75

Phetchaburi 76

Prachuap Khiri Khan 77

Chumphon 80

Ranong 81

Surat Thani 82

Phang Nga 83

Nakhon Si Thammarat 84

Krabi 85

Phuket 86

Phatthalung 90

Trang 91

Songkhla 92

Satun 93

Pattani 94

Yala 95

Betong 951

Narathiwat 96

Thank you for the information from the Department of Land Transport.