Area Code 370 – Mataram/Praya

Overview of Area Code 370

Area code 370 is a geographic National Destination Code (NDC) within the Indonesian numbering plan, assigned to the western part of the island of Lombok in West Nusa Tenggara province. It serves the city of Mataram, the provincial capital, and the nearby town of Praya, which is the capital of Central Lombok Regency. The code covers the administrative areas of Mataram City, West Lombok Regency, and Central Lombok Regency, including the popular tourist destination of Senggigi and the vicinity of the Lombok International Airport (LOP) near Praya.

Dialing Formats

When calling a fixed-line number in this region from within Indonesia (outside the local area), you must dial the trunk prefix 0, followed by the area code 370, and then the subscriber number. For example, to reach a landline in Mataram with the number 123456, you would dial: 0370 123456.

For international callers, the format is: +62 370 123456 (drop the leading 0). The subscriber number length varies between 6 and 8 digits, depending on the service provider and the specific exchange. Local calls within the same area code can often be made using just the subscriber number, but for clarity and consistency, it is recommended to always use the full national format.

Geographic Coverage and Overlays

The 370 area code is a geographic code, meaning that the number is tied to a physical location. There are currently no overlay codes in this region, so the 370 code is the sole area code for the region. However, as with many Indonesian cities, mobile phone usage is dominant, and fixed-line penetration is relatively low. The area code is used for PSTN (Public Switched Telephone Network) lines, as well as some VoIP-based fixed services that are assigned geographic numbers.

Caller Instructions

• Local callers (within the 370 area): dial the subscriber number directly, or use 0370 + subscriber number if your phone system requires it.
• National callers (from other Indonesian cities): dial 0370 followed by the subscriber number.
• International callers: dial your country's exit code, then 62 (Indonesia's country code), then 370 (without the leading 0), and then the subscriber number. For example, from the US, you would dial: 011 62 370 123456.

Always ensure you have the correct number of digits after the area code. If you are unsure, contact your telecom provider or the Indonesian directory assistance.