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?
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.
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.
Free tools
Look up a number from Vietnam
Phone number checkerCheck the country and format of a number from Vietnam instantly.Phone number validatorValidate a number against its country's formatting rules (E.164).Carrier lookupCheck a number's country and format for free; live carrier data comes with the Lookup API.All country codesDialing codes, time zones and calling guides for every country.
Frequently Asked
Vietnam questions answered.
Answers about Vietnam's carrier landscape, hierarchy-aware calling etiquette, and getting a local +84 virtual number.
Dial 011 (the US exit code), then 84, then the national number, leaving out any domestic trunk prefix (such as a leading 0).
Start calling Vietnam, not tomorrow.
Get a virtual Vietnam number or make direct international calls to +84 — active in under ten minutes.