Area Code 812 – Mobile Network
The phone area code for Mobile Network is 812 (international format +62812). Browse local exchange codes (NXX) and carrier assignments below.
Overview of Indonesia's +62 812 Mobile Prefix
The +62 812 prefix is a non-geographic mobile network code assigned to Indonesia's cellular telecommunications system. It is part of the national numbering plan administered by the Indonesian Ministry of Communication and Information Technology (Kominfo) and follows ITU-T E.164 recommendations. Unlike geographic area codes, 812 does not correspond to a physical region; it is used exclusively for mobile services, enabling subscribers to retain their numbers while traveling across the archipelago.
In the international format, a typical Indonesian mobile number with the 812 prefix is written as +62 812-XXXX-XXXX, where 'X' represents the subscriber's unique digits. The total length of an Indonesian mobile number, including the country code, is 13 digits (e.g., +62 812 3456 7890). Domestically, callers dial 0812-XXXX-XXXX, dropping the country code and using the leading '0' trunk prefix.
Network Operators and Portability
The 812 prefix was originally allocated to PT Telekomunikasi Selular (Telkomsel), Indonesia's largest mobile network operator. However, due to Mobile Number Portability (MNP) regulations, subscribers may now retain their 812 numbers when switching to other operators, such as Indosat Ooredoo Hutchison, XL Axiata, or 3 (Tri). Therefore, the prefix alone does not guarantee the current network provider; verification via the national database is recommended for enterprise messaging or call routing.
Dialing Instructions
- Domestic calls (within Indonesia): Dial 0812-XXXX-XXXX.
- International calls (from abroad): Dial your country's exit code (e.g., 011 from the US, 00 from most European countries), then 62 812-XXXX-XXXX (omit the leading '0').
- International SMS: Use the same format as voice calls: +62 812-XXXX-XXXX.
Regulatory and Technical Considerations
All Indonesian mobile numbers, including 812, are subject to SIM registration laws requiring valid identification. The country code +62 is part of the Asia-Pacific telephony region, and calls to and from Indonesia are routed via international gateway exchanges. For businesses, 812 numbers are widely used for customer engagement, OTP verification, and two-factor authentication, given their high penetration and reliability.
When integrating 812 numbers into communication systems, it is crucial to normalize them to E.164 format by removing the leading '0' and adding the +62 country code. This ensures seamless routing across international networks and compliance with global telecom standards.