Area Code 556 – Nunukan
The phone area code for Nunukan is 556 (international format +62556). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Nunukan
Overview of Area Code 556 (Nunukan, Indonesia)
Area code 556 is a geographic National Destination Code (NDC) assigned under the Indonesian national numbering plan, which adheres to the ITU-T E.164 international standard. This code serves the Nunukan Regency (Kabupaten Nunukan), located in the province of North Kalimantan (Kalimantan Utara) on the island of Borneo. Nunukan lies directly on the border with Malaysia (Sabah and Sarawak) and is a key gateway for cross-border trade and migration.
The geographic area covered by code 556 includes the administrative capital Nunukan and surrounding districts such as Sebatik, Nunukan Selatan, and Nunukan Tengah. These areas are part of Indonesia's outermost regions, with a significant portion of the population engaged in border commerce, agriculture, and fisheries.
Dialing Formats and Usage
For callers within Indonesia, the local dialing format for Nunukan is 0-556-XXXXXXX, where the leading 0 is the trunk prefix, 556 is the area code, and the subscriber number typically consists of 5 to 7 digits. For example, to call a fixed line in Nunukan from Jakarta, you would dial: 0-556-123456.
For international callers, the Indonesian country code +62 replaces the trunk prefix. Thus, the same number would be dialed as +62-556-123456 from abroad. It is crucial to omit the leading 0 when using the international format.
Regulatory and Technical Considerations
Area code 556 is classified as a geographic number, meaning it is tied to a physical location. However, with the advent of VoIP and fixed-wireless services, numbers with this code may be used by operators that do not strictly route calls over traditional PSTN lines. Nevertheless, the code remains associated with the Nunukan area for number portability and regulatory purposes.
As of the latest updates, Indonesia has not introduced an overlay code for Nunukan; therefore, local calls within the same area code do not require the area code. However, when calling from other regions in Indonesia, the full national format with the trunk prefix is mandatory.
For businesses and individuals in Nunukan, it is recommended to display numbers in international format (+62 556 ...) on websites and global directories to facilitate seamless communication with overseas partners. This practice aligns with the E.164 recommendation and reduces dialing errors.