Area Code 44 – Buri Ram/Chaiyaphum/Nakhon Ratchasima/Surin

Geographic Coverage and Administrative Jurisdiction

The +66 44 country-code/area-code combination is a geographic National Destination Code (NDC) assigned to the lower northeastern region of Thailand (Isan). Specifically, it serves the provinces of Nakhon Ratchasima (Korat), Buri Ram, Chaiyaphum, and Surin. Nakhon Ratchasima, the largest province in Thailand by area and population, is the primary economic and administrative hub within this numbering area. The code is administered by the National Broadcasting and Telecommunications Commission (NBTC) of Thailand and is allocated to fixed-line PSTN services.

Dialing Formats and Caller Instructions

For domestic callers within Thailand, the trunk prefix '0' is used before the area code. Thus, calling a fixed line in Nakhon Ratchasima from elsewhere in Thailand requires dialing 0 44 XXX XXX (where X represents the subscriber number). The complete national significant number (NSN) is 9 digits, including the leading '0'.

For international callers, the leading '0' is omitted, and the country code +66 is used. The correct international format is +66 44 XXX XXX. For example, a fixed line in Buri Ram might be reached at +66 44 123 456. When dialing from abroad, ensure you replace the '+' with your country's international access code (e.g., '011' from the US, '00' from most European countries).

Numbering Structure and Overlays

Subscriber numbers within the +66 44 area code are 6 to 7 digits long, depending on the specific province and exchange. The total length of the international number (including country code but excluding the trunk prefix) is always 9 digits. There are no overlay codes in this region; the 44 code is exclusively used for the four provinces listed. However, due to the large geographic area, local calling between provinces within the same code may still require the area code if they are in different local calling areas.

Services and Usage

This geographic code is primarily used for fixed-line telephony, including residential, business, and government lines. It supports traditional PSTN services as well as VoIP-based fixed lines that are registered to a physical address in the region. Mobile numbers in Thailand use separate prefixes (e.g., 06, 08, 09) and are not affected by this geographic code. When calling a +66 44 number, the call is routed to a physical location within the covered provinces, which is important for emergency services and location-based services.