Vietnam Phone Numbers: Format, Area Code & Validation Guide - phone-number-standards -

Frequently Asked Questions

Vietnamese phone numbers are formatted according to their type: geographic, mobile, toll-free, or premium rate. Geographic numbers follow 0AA XXXXXXX, mobile numbers use 0XX XXXXXXXX, toll-free numbers are 1800 XXXX or 1800 XXXXXX, and premium-rate numbers follow 1900 XXXX or 1900 XXXXXX. Consistent formatting is important for readability and user experience within applications.
The country code for Vietnam is +84. This code, according to ITU-T Recommendation E.164, precedes all Vietnamese phone numbers when dialing internationally and is essential for global connectivity.
Vietnam uses area codes (0AA) for geographic (landline) numbers to route calls to specific administrative regions. These codes vary in length (2 or 3 digits), with major cities like Ho Chi Minh City (028), Hanoi (024), and Da Nang (0236) having their own distinct codes.
You should always store and process Vietnamese phone numbers in E.164 format (+84XXXXXXXXXX) for consistent storage, international compatibility, and simplified integration with global systems, particularly crucial when handling varied user input.
Yes, you can identify a Vietnamese mobile carrier by examining the network prefix (0XX) of a 10-digit mobile number. Each operator has a specific prefix range, like Viettel (032-039, 096-098), MobiFone (070, 076-079, 090, 093), and Vinaphone (081-085, 091, 094).
Vietnam mobile numbers follow a standardized 10-digit format: 0XX XXXXXXXX, where 0XX represents the network prefix and the remaining digits are the subscriber number. This standardization simplifies integration and validation for developers, replacing the previous mix of 10 and 11-digit numbers.
Use regular expressions for robust validation of Vietnamese phone numbers. For example, geographic numbers can be validated with /^0([2-9]\d{1,2})\d{7,8}$/, mobile numbers with /^0(3[2-9]|5[2689]|7[06-9]|8[1-5]|9[0-4689])\d{7}$/, ensuring accurate data and preventing errors.
Toll-free numbers in Vietnam follow the format 1800 XXXX or 1800 XXXXXX. These numbers allow callers within Vietnam to contact businesses without incurring charges, and they are typically used for customer support and services.
Premium-rate numbers in Vietnam use the format 1900 XXXX or 1900 XXXXXX. These numbers are used for value-added services like contests, voting lines, and entertainment, often incurring higher charges for the caller.
The 2G network in Vietnam is scheduled to shut down in September 2024. Developers should ensure their systems are prepared for this by implementing fallback mechanisms and notifying users, especially for applications relying on 2G connectivity.
Vietnam's updated Telecommunications Law, effective July 1, 2024, introduces new regulations for data centers, cloud computing, and Over-The-Top (OTT) services, impacting licensing and operations. Developers should be aware of registration requirements for OTT services and data protection obligations.
For the latest regulatory updates and technical requirements related to Vietnam's telecommunications sector, monitor the Ministry of Information and Communications (MIC) website at https://www.mic.gov.vn/. This is essential for staying informed about changes and maintaining compliance.
Future trends in Vietnam's telecommunications landscape include the ongoing 5G evolution, increasing integration of the Internet of Things (IoT), and enhanced security measures. Developers should plan for increased bandwidth, reduced latency, M2M number ranges, and implementing additional verification for premium services.
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