Postal Code Prefix

Region

1

Central zone

2

Eastern zone

3

Northeastern part 1

4

Northeastern part 2

5

Upper Northern zone

6

Lower Northern zone

7

Lower Central zone

8

Southern zone

9

Southern border zone

Postal Code Prefix

District

10

Samut Prakan plus the Bangkok special administrative area

11

Nonthaburi

12

Pathum Thani

13

Ayutthaya

14

Ang Thong

15

Lop Buri

16

Sing Buri

17

Chai Nat

18

Saraburi

20

Chonburi plus the Pattaya self-governing municipal area

21

Rayong

22

Chanthaburi

23

Trat

24

Chachoengsao

25

Prachin Buri

26

Nakhon Nayok

27

Sa Kaeo

30

Nakhon Ratchasima

31

Buriram

32

Surin

33

Sisaket

34

Ubon Ratchathani

35

Yasothon

36

Chaiyaphum

37

Amnat Charoen

38

Bueng Kan

39

Nong Bua Lamphu

40

Khon Kaen

41

Udon Thani

42

Loei

43

Nong Khai

44

Maha Sarakham

45

Roi Et

46

Kalasin

47

Sakon Nakhon

48

Nakhon Phanom

49

Mukdahan

50

Chiang Mai

51

Lamphun

52

Lampang

53

Uttaradit

54

Phrae

55

Nan

56

Phayao

57

Chiang Rai

58

Mae Hong Son

60

Nakhon Sawan

61

Uthai Thani

62

Kamphaeng Phet

63

Tak

64

Sukhothai

65

Phitsanulok

66

Phichit

67

Phetchabun

70

Ratchaburi

71

Kanchanaburi

72

Suphan Buri

73

Nakhon Pathom

74

Samut Sakhon

75

Samut Songkhram

76

Phetchaburi

77

Prachuap Khiri Khan

80

Nakhon Si Thammarat

81

Krabi

82

Phang Nga

83

Phuket

84

Surat Thani

85

Ranong

86

Chumphon

90

Songkhla

91

Satun

92

Trang

93

Phatthalung

94

Pattani

95

Yala

96

Narathiwat