Vietnam country code, +84 explained.
Everything you need to call Vietnam with Twiching — full dialing format, step-by-step guide, and Tier-1 CLI routes that land every call.
Vietnam
Hanoi · Asia
· COUNTRY INFO · VERIFIED
ISO Alpha-2
VN
Capital
Hanoi
Region
Asia
Timezone
UTC+7
· DIALING GUIDE · VERIFIED
FULL DIAL FORMAT
011 · +84 · XX · XXXXXXXX
How Vietnam numbers break down
A complete number to Vietnam follows this pattern. Twiching adds the exit and country codes automatically when you dial from the app.
EXIT CODE
Dial from the US/Canada to leave the country.
COUNTRY CODE
Routes the call directly into Vietnam.
AREA / MOBILE
Regional or mobile prefix — drop the leading 0.
LOCAL NUMBER
The subscriber's local number.
COMPLETE NUMBER FORMAT
011 · +84 · XX · XXXXXXXX
Vietnam on the map
Hanoi · Asia
ROUTE
Tier-1 Direct
CLI
Verified
ASR
60%+ min
Virtual numbers & SIP trunking for Vietnam
Businesses expanding into Vietnam typically start with a local +84 virtual number: it's provisioned in the dashboard, rings through to any device, and presents local caller ID from the first call.
Local +84 caller ID
Calls display a recognisable Vietnam number instead of an unfamiliar international one.
SIP trunking
Route your existing PBX or softphone through Twiching's Tier-1 trunk — no hardware swap.
Minutes to provision
Numbers activate in the dashboard the same day, with no on-the-ground carrier contract.
+84
Vietnam · ready to provision today
What makes Twiching's Vietnam routes different
Every call into Vietnam rides the same Tier-1 backbone Twiching uses across all 191 countries — no separate infrastructure, no separate reliability tier for smaller markets.
Vietnam
+84
191
Countries in directory
VIETNAM INCLUDED
99.97%
Call delivery rate
STIR/SHAKEN
500+
Carrier interconnects
TIER-1 DIRECT
60%+
Guaranteed ASR
REAL-TIME ROUTING
How Vietnam phone numbers are structured
Numbering Format
COUNTRY
+84
AREA
XX
LOCAL
XXXXXXXX
Vietnam's numbering plan is open, sitting under country code +84: a 2-digit prefix followed by a 8-digit local number, 10 digits combined. Numbers are often shown with a leading "0" for domestic use — drop it when dialing in from abroad.
Carriers & language
Mobile coverage in Vietnam comes from 3 major networks — Viettel, MobiFone, Vinaphone — with internet penetration at 79%. VoIP is permitted and regulated by Ministry of Information and Communications (MIC). Language (Vietnamese) and currency (VND) both matter here for IVR, SMS, and scheduling support around local business hours.
Asia context
Asian markets range from fully liberalised to licensed-only VoIP, so compliant routing and correct local caller ID have an outsized effect on answer rates.
Skipping the exit code
From the US you must dial 011 before the +84 country code to reach Vietnam.
Keeping the national trunk "0"
That leading 0 on a Vietnam number is for domestic calls only; leave it out when dialing in after +84.
Ignoring the time difference
Before dialing Vietnam, check the local clock — it runs on UTC+7, and off-hours calls tend to go unanswered.
Compliance, carriers & rates for Vietnam
Permitted — VNPT regulated
Regulated by Ministry of Information and Communications (MIC)
VoIP is openly regulated in Vietnam under Ministry of Information and Communications (MIC), so there's no licensing hurdle to clear before routing calls or SMS through a compliant provider like Twiching.
- VoIP is permitted but operators must obtain a license from the MIC.
- The Cybersecurity Law 2018 imposes data localization and user data obligations.
- Operators must maintain lawful interception capability as required by Vietnamese law.
Direct Tier-1 interconnect with Viettel — no wholesale transit in between.
US → Vietnam
$0.012/min
Vietnam → US
$0.015/min
Billed per second, not rounded to the minute
How businesses use a Vietnam number
Answer-rate advantage
Cold outbound into Vietnam converts better from a recognisable +84 number than from a foreign-looking one, especially on first contact.
Consistent delivery into Asia
Vietnam sits on the same Tier-1 routing Twiching uses across Asia, so call quality doesn't drop when a campaign expands beyond one country.
Follow-the-sun coverage
Staff Vietnam hours (UTC+7) with routing that sends calls to the right team at the right local time.
Test the market before committing
A Vietnam SIP trunk lets a team pilot the market on a real local number, then scale to full local hiring later without changing the number customers already know.
FAQ
Calling Vietnam — frequently asked questions
3 major networks serve Vietnam: Viettel, MobiFone, Vinaphone. Twiching interconnects directly with these carriers over Tier-1 routes rather than relying on third-party transit.
Twiching rates to Vietnam start at $0.012/min, and calls back from Vietnam to the US start at $0.015/min. Both directions are billed per second rather than rounded up to the nearest minute, on Tier-1 routes throughout.
Yes — since Vietnam runs on UTC+7, calls can be routed to the right team based on local business hours there. That's especially useful for support or sales teams covering multiple countries across different time zones from one platform.
Vietnam's local currency is VND, which is worth factoring into any pricing or invoicing shown to customers there. Twiching's own per-minute rates to and from Vietnam are quoted in USD regardless of the local currency.
Over Tier-1 direct interconnects with major local networks like Viettel, rather than lower-quality wholesale transit routes. That direct-carrier approach is what keeps delivery rates and call clarity high.
Yes. Twiching provisions Vietnam virtual numbers with local +84 caller ID for calls and, where supported, SMS. A recognisable local number tends to get answered more often than an unfamiliar international one, which makes it useful for sales, support, and building local market presence.
Full country code directory
The rest of Asia is one click away — each country page below follows the same format as Vietnam: dial code, numbering plan, carriers, and current rates. All 190 other countries are listed below, Asia first.
Get started
Get a Vietnam number.
See what a real phone stack does.
Phone numbers, voice, SMS and AI on one account. Direct Tier-1 routing into Vietnam from day one.
Compliance with applicable regulations required.