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Comprehensive Guide to Phone Numbers in Indonesia
Quick Reference
- Country: Indonesia
- Country Code: +62
- International Prefix: 00
- National Prefix: 0
Overview
This guide offers an in-depth look at Indonesia's telephone numbering system, covering number formats, dialing procedures, and regulatory guidelines. It's designed for telecom professionals, developers, and business users who need to understand and implement Indonesian phone number formats effectively.
Number Formats
General Number Structure
Indonesia's phone numbers vary by service type, including geographic, mobile, and toll-free services. Below is a breakdown of common formats:
| Type | Format | Example |
|---|---|---|
| Geographic | 2[1-9]X{7,8} | 0212345678 |
| Mobile | 8[1-9]X{7,10} | 81234567890 |
| Toll-Free | `001[7 | 803]X7` |
| Premium Rate | 809X{7} | 8091234567 |
| Shared Cost | 804X{7} | 8041234567 |
Geographic Numbers (Landline)
- Format:
2[1-9]X{7,8} - Example:
0212345678(Jakarta)
Mobile Numbers
- Format:
8[1-9]X{7,10} - Example:
81234567890
Toll-Free Numbers
- Format:
001[7|803]X{6,7} - Example:
0018031234567
Premium Rate Numbers
- Format:
809X{7} - Example:
8091234567
Shared Cost Numbers
- Format:
804X{7} - Example:
8041234567
Dialing Rules
Domestic Calls
- Landline to Landline: Dial
0+ area code + subscriber number.- Example:
0212345678
- Example:
- Landline to Mobile: Dial
0+ mobile number.- Example:
081234567890
- Example:
- Mobile to Mobile: Dial the mobile number directly.
- Example:
081234567890
- Example:
International Calls
- Outgoing: Dial
00+ country code + area code + subscriber number.- Example (to the US):
0011234567890
- Example (to the US):
- Incoming: Dial
+62+ local number (omit leading0).- Example:
+6281234567890
- Example:
Number Portability
Since 2015, Indonesia supports mobile number portability (MNP), allowing users to keep their numbers when changing service providers. This applies to both mobile and fixed-line numbers.
Major Telecom Operators and Number Ranges
| Operator | Number Range | Type |
|---|---|---|
| Telkom Indonesia | 021, 022, 031, etc. | Geographic |
| XL Axiata | 0817, 0818, 0819 | Mobile |
| Indosat Ooredoo | 0855, 0856, 0857 | Mobile |
| Smartfren | 0881, 0882, 0883 | Mobile |
ITU-T Recommendations
Indonesia's numbering plan complies with ITU-T Recommendation E.164, ensuring global compatibility of telephone networks through standardized numbering formats.
Number Allocation and Management
The Indonesian Communications and Information Ministry (Kemenkominfo) oversees the allocation and management of phone numbers. For the latest regulations, visit their official website.
Technical Considerations
Regular Expressions for Validation
- Geographic:
^2[1-9]\d{7,8}$ - Mobile:
^8[1-9]\d{7,10}$ - Toll-Free:
^001(7|803)\d{6,7}$ - Premium Rate:
^809\d{7}$ - Shared Cost:
^804\d{7}$
Number Blocking and Golden Numbers
While Indonesia doesn't officially designate "golden numbers," certain numbers may be reserved for special services. Number blocking is managed by operators under Kemenkominfo regulations.
Note: For the most current telecommunications regulations in Indonesia, consult the Indonesian Communications and Information Ministry.
Conclusion
Indonesia's telephone numbering system is designed to meet international standards and the needs of its population. Understanding its structure and dialing rules is crucial for effective communication both locally and internationally. This guide provides essential technical details for telecom professionals and developers to ensure compliance and optimal performance when handling Indonesian phone numbers.