Area Code 552 – Tanjungselor

Overview of Area Code +62 552

Area code 552 is a geographic destination code within the Indonesian national numbering plan, assigned to the municipality of Tanjungselor, the capital of Bulungan Regency in North Kalimantan Province (Kalimantan Utara). This code follows the ITU-T E.164 international standard and is used for fixed-line PSTN services. When dialing a Tanjungselor number from abroad, the full international format is +62 552 XXX XXXX, where the leading '0' of the domestic trunk prefix is omitted. Domestically, callers within Indonesia dial 0552 XXX XXXX.

Geographic Coverage and Administrative Jurisdiction

The 552 area code serves Tanjungselor and its surrounding administrative districts within Bulungan Regency. Key areas include the urban center of Tanjungselor, the port area, and nearby settlements along the Kayan River. As a geographic code, it is tied to a specific physical exchange area, and numbers are allocated to fixed-line operators such as Telkom Indonesia and other licensed PSTN providers. The code does not cover mobile services; Indonesian mobile numbers use separate non-geographic prefixes (e.g., 081x, 082x, 083x).

Dialing Formats and Caller Instructions

For local callers within the 552 area (same code), seven-digit local numbers may be dialed without the area code, though this practice is becoming less common with modern overlay and unified dialing. For callers from other parts of Indonesia, the domestic format is 0552 followed by the subscriber number. International callers must use +62 552 followed by the subscriber number, replacing the trunk prefix '0'. For example, a local number 123 4567 would be dialed as +62 552 123 4567 from abroad, and as 0552 123 4567 from within Indonesia outside the area.

Overlay and Numbering Plan Considerations

As of the current ITU-T and Indonesian regulatory updates, there is no overlay code for Tanjungselor; 552 remains the sole geographic code for the region. However, with the gradual migration toward all-IP networks, some fixed-line numbers may be routed over VoIP infrastructure, but the geographic significance of the code remains for regulatory and emergency services. Callers should always verify the subscriber number length, as it may vary between 5 and 7 digits depending on the operator and historical allocations.

Practical Usage and Business Implications

Businesses establishing a presence in Tanjungselor often acquire local numbers with this code to build trust and local presence. For international companies, obtaining a +62 552 number can facilitate local customer communication. However, due to the relatively small population, most enterprises rely on mobile or toll-free services for broader reach. When dialing from abroad, ensure you have the correct international exit code (e.g., 011 from the US, 00 from many countries) followed by 62, then 552, and the local number. Avoid omitting the area code, as calls may not be routed correctly.