Area Code 36 – Lop Buri/Saraburi/Sing Buri

Overview of Area Code +66 36

Area code 36 is a geographic National Destination Code (NDC) within the Thai numbering plan, assigned to the central region of Thailand, specifically covering the provinces of Lop Buri, Saraburi, and Sing Buri. This code is used for fixed-line (PSTN) services, including traditional analog lines and some VoIP-based fixed services that are geographically tied to these areas. The code is administered under the ITU-T E.164 standard, with Thailand's country calling code +66.

Geographic Coverage and Administrative Jurisdiction

The area code 36 serves a mix of urban and rural districts. Lop Buri is known for its historical significance and agricultural economy, with the provincial capital also named Lop Buri. Saraburi is an industrial hub, home to major cement and manufacturing plants, and serves as a key transport corridor. Sing Buri is a smaller province, primarily agricultural, located along the Chao Phraya River. These provinces are part of Thailand's central region, and the area code is administered by the National Broadcasting and Telecommunications Commission (NBTC) of Thailand.

Dialing Formats

For local callers within Thailand, the trunk prefix 0 is dialed before the area code, followed by the subscriber number. The full national format is 0 36 XXX XXX (where X represents the local subscriber digits). For international callers, the country code +66 is used, and the leading trunk prefix '0' is dropped. Thus, the international format becomes +66 36 XXX XXX.

When calling from abroad, you would dial: +66 36 XXX XXX. For example, a number in Saraburi might be +66 36 123 456. It is important to note that the number of subscriber digits can vary, typically ranging from 6 to 7 digits, depending on the specific exchange and the number of lines in the area.

Overlay Considerations and Numbering Changes

As of the latest updates, there are no overlay codes for area code 36; it remains the sole geographic code for these provinces. However, due to the increasing demand for fixed-line services and the integration of VoIP, some numbers may be assigned to non-geographic services, but they retain the geographic code for routing purposes. Callers should always verify the number format with the recipient to ensure accurate dialing.

Caller Instructions

For local callers within the same area code, it is often possible to dial only the subscriber number, but it is recommended to use the full national format to avoid misdialing. For callers from other parts of Thailand, dial 0 36 followed by the subscriber number. For international callers, always use +66 36 and omit the leading '0'. Ensure that you have the correct international exit code for your country (e.g., 011 from the US, 00 from most European countries) before dialing +66.