How to Call Vietnam From the US: Complete Guide (+84)

Vietnam is a growing calling destination from the US, driven by the large Vietnamese American community (2M+), increasing business ties, and tourism. VoIP rates to Vietnam are very competitive — $0.02-$0.04/min vs $2-$4 through US carriers.

How to Dial Vietnam From the US

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+84 + Number (drop the leading 0) Hanoi landline: +84 24 1234 5678 Ho Chi Minh City: +84 28 1234 5678 Mobile: +84 90 123 4567 Mobile: +84 98 765 4321

Step by Step

Dial + (or 011)
Dial 84 (Vietnam country code)
Drop the leading 0
Dial the rest of the number

Important: Vietnam changed its area codes in 2017. Hanoi changed from 04 to 024, and HCMC from 08 to 028. From the US, these become +84 24 and +84 28.

Vietnam Area Codes

Vietnamese Mobile Prefixes

Cheapest Ways to Call Vietnam

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AT&T charges $4/min to Vietnam. A 20-minute call: $80 on AT&T vs $0.80 on BubblyPhone.

Communication in Vietnam

Zalo — Vietnam's most popular messaging app (not WhatsApp!). 75M+ users. Free voice/video calls. Download Zalo if you want to reach Vietnamese contacts for free.
Viber — also popular in Vietnam, especially among older users
WhatsApp — used but much less common than Zalo
Facebook Messenger — widely used for casual communication

Tips

Time difference: Vietnam is 12 hours ahead of EST (ICT, UTC+7). 8 PM EST = 8 AM Vietnam.
Lunar New Year (Tết): Late Jan/early Feb — businesses closed for 1-2 weeks
Number changes: If an old Vietnamese number doesn't work, check if the area code changed in the 2017 reform

Summary

Calling Vietnam costs $0.02-$0.04/min with VoIP. Dial +84, drop the leading 0. Use Zalo (not WhatsApp) for free calls to Vietnamese contacts. BubblyPhone is the best no-app option for landlines and mobiles.