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Vietnam 📱 Mobile Network

Area Code 37 – Mobile Network

The phone area code for Mobile Network is 37 (international format +8437). Browse local exchange codes (NXX) and carrier assignments below.

Current Local Time
17:30:31
UTC • UTC +00:00
Full Dialing Format
+8437
Population N/A
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Admin Region Vietnam
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Elevation N/A
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GPS Coordinates N/A
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Overview of Vietnam's Mobile Prefix 37

In Vietnam, the prefix 37 is a non-geographic mobile network code assigned to mobile services, not to a specific geographic area. It is part of the national numbering plan under the +84 country calling code (ITU-T E.164). Subscribers using numbers starting with +84 37 are reachable on their mobile devices throughout Vietnam and internationally, regardless of their physical location. This prefix is used by mobile network operators (MNOs) and mobile virtual network operators (MVNOs) that have been allocated number blocks by the Vietnam Telecommunications Authority (VNTA).

Number Format and Dialing Instructions

Vietnamese mobile numbers, including those with the 37 prefix, have a total length of 10 digits when dialed domestically (excluding the trunk prefix 0) or 11 digits when including the leading 0. Internationally, the number is dialed as +84 37 XXX XXXX (where X represents the subscriber number digits). For example, a typical number might be +84 37 123 4567. When calling from within Vietnam, you would dial 037 123 4567 (including the trunk prefix 0). For foreign callers, the format is +84 37 123 4567 or 0084 37 123 4567 depending on the international dialing prefix used in their country.

Mobile Number Portability and Routing

Vietnam has implemented mobile number portability (MNP), allowing subscribers to retain their numbers when switching operators. As a result, the prefix 37 does not guarantee a specific carrier; it only indicates that the number was originally allocated to a mobile service. When routing calls or SMS to a 37 number, the network uses the full number to determine the current operator via a central database. This ensures seamless connectivity even after porting.

International SMS and Voice Routing

For international SMS and voice calls, the +84 37 prefix is recognized as a mobile destination. SMS messages sent to +84 37 numbers are routed via international gateways and delivered to the recipient's mobile network. Voice calls are similarly connected via international transit. It is important to use the correct international format to avoid misdialing.

Regulatory and Usage Considerations

The 37 prefix is part of Vietnam's national numbering plan, which is managed by the VNTA. It is used for both voice and data services, including 3G, 4G, and 5G. There are no special restrictions for calling these numbers from abroad, but charges may apply depending on the caller's international tariff. Businesses often use these numbers for customer contact, and they are widely used for personal mobile communications.

❓ Frequently Asked Questions

Which mobile network operator uses the 37 prefix in Vietnam?
The 37 prefix is not exclusively tied to a single operator due to mobile number portability. Originally, it was allocated to a specific operator, but subscribers can now port their numbers to other networks. To identify the current operator, you can use online lookup services or contact the number directly.
How do I call a Vietnamese number starting with 37 from abroad?
Dial your country's international access code (e.g., 00 or +), then Vietnam's country code 84, followed by the number without the leading 0. For example, to call +84 37 123 4567, you would dial +84 37 123 4567.
Are numbers with the 37 prefix mobile or landline?
They are mobile numbers. In Vietnam, prefixes starting with 03, 05, 07, 08, and 09 are typically mobile, while landlines use area codes like 024 for Hanoi and 028 for Ho Chi Minh City.
Can I port my 37 number to another operator?
Yes, Vietnam supports mobile number portability. You can switch to another operator while keeping your 37 number, subject to the porting process and conditions set by the operators.
What is the cost of calling a 37 number from overseas?
The cost depends on your telecom provider's international calling rates. Typically, calls to Vietnamese mobile numbers are billed per minute, and rates vary. Check with your carrier for specific charges.