How to Call Vietnam from the US: A Guide for SMBs and Startups

You’re about to hop on a call with a supplier in Ho Chi Minh City or a development partner in Hanoi. But right before you dial, you stop — what’s the correct way to call Vietnam from the US? 

If you’re a startup or small business expanding into Southeast Asia, this guide is for you. We’ll break down everything you need to know about dialing formats, the Vietnam country code, and smart, cost-effective solutions for keeping in touch with global contacts. 

What’s the Vietnam Country Code? 

The country code for Vietnam is +84. When calling a Vietnamese phone number from the United States, you’ll need to dial this code after the US international exit code. It helps route your call across the global network to reach the correct recipient in Vietnam. 

How to Call Vietnam from the US, Step by Step 

Vietnam uses regional area codes for landlines and distinct prefixes for mobile numbers. Here’s how to get it right: 

For Vietnam Landlines: 

1. Dial 011 – This is the US exit code 
2. Dial 84 – The Vietnam country code 
3. Dial the area code – Skip the leading 0 
4. Dial the local number 

Example: To call a landline in Hanoi (area code 24), dial: 011-84-24-XXXX-XXXX. 

For Vietnam Mobile Numbers: 

1. Dial 011 (or use + on a mobile phone) 
2. Dial 84 
3. Dial the mobile prefix – Remove the leading 0 
4. Dial the remaining digits 

Example: To call mobile number 0912-345-678, dial: 011-84-912-345-678. Or simply: +84-912-345-678. 

Pro tip: 

On smartphones, long-press the “0” key to insert a “+”, replacing 011. 

Common Vietnam Area Codes 

Here are some of the most common area codes in Vietnam, along with the locations they correspond to: 

When Should SMBs Make International Calls? 

U.S.-based small businesses and startups usually call Vietnam to: 

• Coordinate with offshore development teams or BPO providers 
• Manage manufacturing and supply chain operations 
• Collaborate with partners in APAC 
• Support regional expansion or client onboarding 

Time zone tip: Vietnam is typically 11–12 hours ahead of US Eastern Time, depending on daylight saving. Consider scheduling calls in the late evening or early morning hours. 

How Much Does It Cost to Call Vietnam? 

Rates can vary widely depending on your provider. Traditional carriers often charge between $0.50 and $1.00 per minute, which adds up quickly, especially for frequent business calls. 

DialLink offers a smarter and more affordable solution. With competitive per-minute rates, transparent billing, and no hidden fees, you can stay connected to Vietnam without breaking your budget. View current international calling rates here. 

Make International Calls the Easy Way with DialLink 

DialLink is an AI-powered cloud phone system built for small businesses and startups. Here’s how we make calling Vietnam easy and affordable: 

• Mobile, desktop and desk phone support – Make calls from anywhere, using any device. 
• 24/7 AI voice agents– Automatically answer calls from the Philippines, even after hours. 
• Local & international numbers – Build a global presence with ease. 
• Plug-and-play setup – No IT help required. 
• Affordable, transparent rates – No hidden fees.