Area Code 813 – Mobile Network

Overview of Indonesia's +62 813 Mobile Prefix

The +62 813 prefix is a non-geographic mobile network code assigned to Indonesia's cellular telecommunications sector. Unlike geographic area codes that correspond to specific cities or regions, 813 is part of the country's national numbering plan for mobile services, enabling nationwide connectivity without location-based routing. This prefix is used by several Mobile Network Operators (MNOs) and Mobile Virtual Network Operators (MVNOs), including Telkomsel (through its Kartu Halo and simPATI brands) and its subsidiaries. Subscribers under 813 can be reached anywhere in Indonesia, and the prefix does not indicate the caller's or callee's physical location.

Numbering Format and Dialing Procedures

Indonesian mobile numbers, including those with the 813 prefix, follow the ITU-T E.164 international standard. The complete international format is +62 813 XXXX XXXX, where +62 is the country calling code, 813 is the National Destination Code (NDC), and the remaining eight digits constitute the subscriber number. When dialing domestically, callers must use the trunk prefix '0' before the NDC, resulting in 0813 XXXX XXXX. For international callers, the leading '0' is omitted, and the plus sign (+) or the international access code (e.g., 011 from the US) is used before the country code.

Dialing Examples:

• Domestic call (within Indonesia): 0813 1234 5678
• International call (from abroad): +62 813 1234 5678

Regulatory and Technical Considerations

Indonesia's telecommunications regulator, the Ministry of Communication and Informatics (Kominfo), oversees the allocation of mobile prefixes. The 813 prefix is non-geographic, meaning it is not tied to a specific area code. This facilitates number portability, allowing subscribers to switch operators while retaining their 813 number. For SMS and voice services, routing is based on the full number, and international interoperability is ensured through bilateral agreements between Indonesian carriers and foreign networks. When traveling abroad, Indonesian subscribers can use their 813 numbers via international roaming, subject to their operator's roaming agreements.

For businesses and individuals, the 813 prefix is widely recognized and trusted, making it a common choice for customer service lines and personal mobile use. It is essential for international contacts to use the correct format to avoid call failures. Always verify the complete number, as the eight-digit subscriber portion is crucial for successful routing.