The below are the Postal code of Cambodia area both Phnom Penh area and provincial :
Cambodia Country Code: 855
Telephone Country Code: 855
ISO Country Code, 2 Digit: KH
ISO Country Code, 3 Digit: KHM
Banteay Meanchey +855 54
Battambang +855 53
Kampong Cham +855 42
Kampong Chhnang +855 26
Kampong Speu +855 25
Kampong Thom +855 62
Kampot +855 33
Kandal +855 24
Kep +855 36
Koh Kong +855 35
Kratie +855 72
Mondolkiri +855 73
Pailin +855 55
Phnom Penh +855 23
Preah Vihear +855 64
Prey Veng +855 43
Pursat +855 52
Ratanakiri +855 75
Siem Riep +855 63
Sihanoukville +855 34
Stung Treng +855 74
Svay Rieng +855 44
Takeo +855 32
Udar Meanchey +855 65