Area Code 75 – Krabi/Nakhon Si Thammarat/Trang
The phone area code for Krabi/Nakhon Si Thammarat/Trang is 75 (international format +6675). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Krabi/Nakhon Si Thammarat/Trang
Geographic Allocation and Coverage
Country code +66 is assigned to Thailand under the ITU-T E.164 international numbering plan. The national destination code (NDC) 75 is a geographic area code that serves the southern Thai provinces of Krabi, Nakhon Si Thammarat, and Trang. This allocation is managed by the National Broadcasting and Telecommunications Commission (NBTC) and is used for fixed-line PSTN services within these provinces. The code covers both provincial capitals and rural districts, including the tourist hub of Krabi Town, the commercial center of Nakhon Si Thammarat, and the port city of Trang.
Dialing Formats and Usage
When calling a fixed-line number in this region from abroad, the international format is +66 75 XXX XXX, where the leading trunk prefix '0' is omitted. For example, a local number in Krabi might be dialed as +66 75 123 456 from overseas. Within Thailand, callers must use the trunk prefix '0' before the area code, resulting in 0 75 XXX XXX. Local calls within the same province do not require the area code, but calls between the three provinces must include the full national number.
These numbers are primarily used for residential and business fixed-line services, including government offices, hotels, and local enterprises. The geographic nature of the code means that the number is tied to a physical location, which is important for emergency services and regulatory compliance.
Overlay and Numbering Considerations
As of the latest NBTC guidelines, there is no overlay code for area 75, meaning that the code is exclusively assigned to the three provinces. However, number portability is available for fixed-line services, allowing subscribers to retain their numbers when changing providers within the same geographic area. The NBTC has implemented measures to ensure sufficient numbering capacity, and future expansions may introduce additional digits or overlay codes if demand increases.
For callers, it is essential to verify the correct area code when dialing from outside Thailand, as misdialing can result in calls being routed to a different region. International callers should also be aware of time zone differences (UTC+7) and potential charges from their telecom providers.