Area Code 34 – Kanchanaburi/Nakhon Pathom/Samut Sakhon/Samut Songkhram
The phone area code for Kanchanaburi/Nakhon Pathom/Samut Sakhon/Samut Songkhram is 34 (international format +6634). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Kanchanaburi/Nakhon Pathom/Samut Sakhon/Samut Songkhram
Geographic Coverage and Administrative Jurisdiction
The Thai area code +66 34 is a geographic National Destination Code (NDC) assigned to the western and central provinces of Kanchanaburi, Nakhon Pathom, Samut Sakhon, and Samut Songkhram. These provinces form a contiguous region west of Bangkok, with Nakhon Pathom serving as a major administrative and transport hub. The code covers both provincial capitals and smaller districts, including significant industrial zones in Samut Sakhon and historical sites in Kanchanaburi.
Dialing Formats and Caller Instructions
When dialing from within Thailand, callers must use the trunk prefix 0 followed by the area code and the subscriber number. For example, to call a fixed line in Kanchanaburi, you would dial 0 34 123456. From outside Thailand, the international format requires the country code +66 followed by the area code without the leading zero: +66 34 123456. Local callers within the same province can often omit the area code and dial only the local number, but this practice is becoming less common with the introduction of overlay codes.
Number Structure and Overlay Considerations
Fixed-line numbers under the +66 34 prefix typically consist of six to seven digits after the area code, making the total national significant number (NSN) length nine digits (including the leading zero). As of the latest ITU-T E.164 guidelines, Thailand's NSN is nine digits. Currently, no overlay code has been introduced for this geographic area, but the National Broadcasting and Telecommunications Commission (NBTC) has implemented number portability, allowing subscribers to retain their numbers when changing operators within the same geographic region.
Services and Usage
The +66 34 code is used exclusively for fixed-line PSTN and VoIP services. It supports traditional analog lines, ISDN, and IP-based telephony. Businesses in the region, particularly in industrial estates and tourist areas, rely on this code for local presence and customer service. For international callers, it is essential to replace the trunk prefix '0' with the country code '+66' to ensure proper routing. Calls to this geographic code are typically charged at standard domestic rates when dialed from within Thailand, while international rates apply from abroad.