Postal codes in Thailand are five digit numbers. The first two digits of the postal code denote the province or special administrative area (e.g., 43120 Phon Phisai, Nong Khai), while the last 3 digits represent the post office within the province. There are exceptions, for example, Bangkok and Samut Prakan province shared the first two digits 10xxx. It is typical to use postal code ended with zero 0 because they are assigned to post office that are responsible for delivering mail to the district (amphoe or khet). For example, mails to Dusit district destinations uses postal code 10300 except within Chitralada Palace where postal code 10303 is used. 10300 is postal code of Dusit Post Office which handles the delivery throughout Dusit district while 10303 is postal code of Chitralada Palace Post Office which does not deliver mails outside the palace. Other post offices in Dusit district exist, such as Bang Krabu Post Office with postal code 10301, the code used for mails to be delivered to P.O. Box in the post office.

Postcodes in Thailand were introduced in February 1982. They are issued by the Ministry of Digital Economy and Society (MDES). Postcode Province (Changwat) District (Amphoe)XXXXX Not in the postcode in Thailand Subdistrict(Tambon) Village(Muban) Road(Thanon) Plot/house888/26

Postal zones in Thailand

Postal zone is the first digit of postal code. It is numbered from 1 to 9. Nong Bua Lamphu province and Bueng Kan province have to use postal zone 3 despite its location because at the time of their establishment, postal zone 4 was fully used.

+ Postal zones Postcode Zone 10xxx - 18xxx 1: Central zone 20xxx - 27xxx 2: Eastern zone 30xxx - 39xxx 3: Northeastern part 1 40xxx - 49xxx 4: Northeastern part 2 50xxx - 58xxx 5: Upper Northern zone 60xxx - 67xxx 6: Lower Northern zone 70xxx - 77xxx 7: Lower Central zone 80xxx - 86xxx 8: Southern zone 90xxx - 96xxx 9: Southern border zone

Province and special administrative area Listed below are the first 2 digits of codes assigned to each province or special administrative area.

Special Governed Districts (Khet Phiset) Bangkok uses codes from 10xxx (including Samut Prakan) Pattaya uses codes 20xxx (Chonburi province postal codes)

Province codes + 1: Central zone Province Postcode Bangkok 10xxx Samut Prakan 10xxx Nonthaburi 11xxx Pathum Thani 12xxx Ayutthaya 13xxx Ang Thong 14xxx Lopburi 15xxx Sing Buri 16xxx Chai Nat 17xxx Saraburi 18xxx

+ 2: Eastern zone Province Postcode Chonburi 20xxx Rayong 21xxx Chanthaburi 22xxx Trat 23xxx Chachoengsao 24xxx Prachinburi 25xxx Nakhon Nayok 26xxx Sa Kaeo 27xxx

+ 3: Northeastern part 1 Province Postcode Nakhon Ratchasima 30xxx Buriram 31xxx Surin 32xxx Sisaket 33xxx Ubon Ratchathani 34xxx Yasothon 35xxx Chaiyaphum 36xxx Amnat Charoen 37xxx Bueng Kan 38xxx Nong Bua Lamphu 39xxx

+ 4: Northeastern part 2 Province Postcode Khon Kaen 40xxx Udon Thani 41xxx Loei 42xxx Nong Khai 43xxx Maha Sarakham 44xxx Roi Et 45xxx Kalasin 46xxx Sakon Nakhon 47xxx Nakhon Phanom 48xxx Mukdahan 49xxx

+ 5: Upper Northern zone Province Postcode Chiang Mai 50xxx Lamphun 51xxx Lampang 52xxx Uttaradit 53xxx Phrae 54xxx Nan 55xxx Phayao 56xxx Chiang Rai 57xxx Mae Hong Son 58xxx

+ 6: Lower Northern zone Province Postcode Nakhon Sawan 60xxx Uthai Thani 61xxx Kamphaeng Phet 62xxx Tak 63xxx Sukhothai 64xxx Phitsanulok 65xxx Phichit 66xxx Phetchabun 67xxx

+ 7: Lower Central zone Province Postcode Ratchaburi 70xxx Kanchanaburi 71xxx Suphan Buri 72xxx Nakhon Pathom 73xxx Samut Sakhon 74xxx Samut Songkhram 75xxx Phetchaburi 76xxx Prachuap Khiri Khan 77xxx

+ 8: Southern zone Province Postcode Nakhon Si Thammarat 80xxx Krabi 81xxx Phang Nga 82xxx Phuket 83xxx Surat Thani 84xxx Ranong 85xxx Chumphon 86xxx

+ 9: Southern border zone Province Postcode Songkhla 90xxx Satun 91xxx Trang 92xxx Phatthalung 93xxx Pattani 94xxx Yala 95xxx Narathiwat 96xxx

Numbering within the province The third and fourth digits are used to distinguish different areas within the province. The last digit is zero for the main post office handling the mail delivery, while other post offices in the area have other numbers.

Outside of Bangkok and Samut Prakan, the postal code xx000 is the postal code for the main post office of Amphoe mueang of each province. The remaining area number runs in the sequence xx110, xx120, xx130, ..., xx190, xx210, ...

Bangkok's number system replaces the previous mail addressing system of Bangkok 1, Bangkok 2, etc. The Bangkok 1 area becomes 10100, Bangkok 2 becomes 10200, etc. There is special case that Bangkok 10 becomes 10310, while Bangkok 11, 12, etc. becomes 10110, 10120, etc. There is no postal area 10000, as the number is assigned to Bangkok Mail Center.

Mail facilities In 2018 Thailand Post allocated 10 billion baht to construct two new "automated sorting" centers, one in Chonburi Province and the other in Wang Noi District, Ayutthaya Province. Its goal is to fully automate postal and delivery operations as well back office procedures in 2021.

References

External links Thailand Post