Area Code 326 – Masalembu Islands

Overview of Area Code +62 326

Area code 326 is a geographic National Destination Code (NDC) within the Indonesian public switched telephone network (PSTN), allocated under the international country calling code +62. It serves the Masalembu Islands, an archipelago located in the Java Sea, administratively part of Sumenep Regency, East Java Province. The code covers the main island of Masalembu and the surrounding smaller islands, including Keramaan and Masakambing. These islands are relatively remote, with telecommunications infrastructure primarily provided by fixed-line operators and mobile networks operating under the same numbering area.

Geographic Coverage and Administrative Jurisdiction

The +62 326 numbering area is specifically assigned to the Masalembu Islands district (Kecamatan Masalembu). This district is one of the outermost areas of Sumenep Regency, located approximately 80 nautical miles north of Madura Island. The area code is used for fixed-line services, including PSTN and VoIP-based fixed lines, and is also referenced in mobile number portability databases for numbers originally assigned to this region. However, mobile numbers in Indonesia are non-geographic and use their own prefixes (e.g., 0811, 0812, etc.), so the 326 code is primarily associated with landline and fixed-wireless services.

Dialing Formats and Instructions

To call a fixed-line number in the Masalembu Islands from within Indonesia, subscribers must dial the trunk prefix 0, followed by the area code 326, and then the subscriber number. For example, if the local subscriber number is 12345, the domestic dialing format is 0326 12345. From outside Indonesia, callers must dial the international access prefix (e.g., 00 or +), followed by Indonesia's country code 62, then the area code without the leading zero, and the subscriber number. Thus, the international format becomes +62 326 12345. It is important to note that the subscriber number length may vary, but the total length of the national significant number (NSN) after the trunk prefix is typically 8 to 10 digits, including the area code.

Overlay and Numbering Plan Considerations

As of the current Indonesian numbering plan, there is no overlay code for the 326 area. The code is exclusively assigned to the Masalembu Islands, and no other regions share this NDC. Callers from other parts of Indonesia must always include the trunk prefix and area code when dialing a fixed-line number in this region, even if calling from a nearby area. For international callers, it is essential to replace the leading zero with the country code +62. The Indonesian Telecommunication Regulatory Authority (BRTI) oversees the allocation and management of numbering resources, and any changes to the numbering plan would be announced officially. For now, the +62 326 code remains a stable identifier for the Masalembu Islands' fixed-line services.