Network & carriers
Vietnam's telecom market is regulated by the MIC, with Viettel, VinaPhone, and MobiFone as the three major carriers.
+84 · VN · UTC+7
Vietnam
Country Code & Virtual Numbers
Vietnam's +84 code covers one of Southeast Asia's fastest-growing mobile markets, led by state-linked carrier Viettel. Capital: Hanoi · Business hours: 9:00 PM–5:00 AM EST.
// The Basics
What is the +84 country code?
Vietnam's international dialing code is assigned by the ITU (International Telecommunication Union) and used for every call placed from outside the country.
Numbering format
Vietnamese mobile numbers are 9 or 10 digits depending on carrier, with the leading 0 dropped internationally.
Calling culture
Vietnamese business culture places importance on respect and hierarchy — addressing contacts formally and building trust over time is standard practice.
Did you know
Vietnam renumbered its entire mobile numbering system in 2018, shifting millions of subscribers to new 10-digit numbers to accommodate growth.
// Quick Facts
A quick read on Vietnam numbers.
Vietnamese mobile numbers drop their leading 0 internationally, and most now follow a 10-digit format after the country's 2018 renumbering. Rozper stores and dials contacts in full E.164 format automatically, so you never have to think about the formatting.
Want to call Vietnam from abroad? Dial your local exit code, then 84, then the local number.
Best time to call Vietnam from the US
Vietnam is on UTC+7 · Business hours = – EST · Mon–Fri
// Why a Virtual Number
Why get a Vietnam virtual number?
A +84 virtual number gives your business instant local presence in Vietnam — without the overhead.
Local caller ID in Vietnam
When you call from your virtual Vietnam number, contacts see a local +84 number — dramatically improving answer rates.
No office needed
Establish a local presence in Vietnam without renting space, hiring locally, or installing any hardware.
Instant credibility
Vietnamese consumers are increasingly mobile-first, and a recognizable local number improves the odds of a call being picked up at all.
Routes to any device
Calls to your Vietnam number ring your team on mobile, desktop, or desk phone — wherever they work.
// Platform Features
Everything to call Vietnam
The tools to reach Vietnam contacts reliably and scale your international presence globally.
150+ country coverage
Get virtual numbers in over 150 countries on the same platform — one dashboard, one bill.
HD voice quality
Crystal-clear calls over our optimised global carrier network. No degraded quality from international routing.
Call recording
Every call recorded and transcribed automatically. Review, share, and reference conversations easily.
Voicemail to text
Voicemails transcribed and delivered by email or SMS. Never miss a message across time zones.
CRM auto-logging
All calls to and from your international number auto-logged in Salesforce, HubSpot, or Zoho.
International analytics
Call volume, answer rates, and duration broken down by country, region, and time of day.
Local Caller ID
Show a local country number as your caller ID when dialling internationally. Improves pickup rates significantly.
Instant provisioning
Activate a new country number in under 60 seconds. No contracts, no hardware, no waiting.
99.99% uptime SLA
Enterprise-grade reliability for your international calling infrastructure, 24/7.
// Get Started
Get a Vietnam number today
Active in under ten minutes. No contracts required.
- 01
Sign up
Create your Rozper account in under 2 minutes. No credit card required to start your free trial.
- 02
Get your number
Browse available numbers in your target country and activate instantly.
- 03
Configure routing
Route calls to any device. Set business hours, voicemail, and IVR from your dashboard.
- 04
Start calling globally
Make and receive international calls immediately. Active in under 10 minutes.
// Complete List
All world dial codes by country.
Every country and territory, every international dial code. Click a country to browse it.
List of World Countries and Their Dial Codes
CountryDial CodeRegionLocal Time
Showing all 237 countries & territories* Local time updates every minute
Frequently Asked
Vietnam questions answered.
Answers about Vietnam's carrier landscape, hierarchy-aware calling etiquette, and getting a local +84 virtual number.
The international dialing code for Vietnam is +84. When calling from the US, dial 011 + 84 + the local number. Rozper handles this automatically.
A Vietnam virtual number goes live in under 10 minutes. Ask us how.
Start calling Vietnam, not tomorrow.
Get a virtual Vietnam number or make direct international calls to +84 — active in under ten minutes.