Vietnam country code +84 — call Vietnam & get a number.
Vietnam reshuffled its entire mobile numbering in 2018, so half the prefixes floating around online no longer work. Here's the up-to-date +84 format, the post-reform 03/05/07/08/09 mobile ranges, Hanoi and Ho Chi Minh City area codes, live time and weather, and how to pick up a Vietnamese virtual number with MCM.
- 17,500+ Businesses
- 99.99% Uptime SLA
- 190+ Countries
- 4.8/5 on G2
Vietnam at a glance
The numbers and facts you need before you dial.
What is the country code for Vietnam?
Vietnam answers to +84. Domestically, every number wears a trunk "0" up front — a city code for landlines, a network prefix for mobiles. The single rule for calling in from abroad: that leading 0 disappears.
So you dial your exit code, then 84, then the number with its 0 stripped off. One more thing worth flagging before you trust any Vietnamese number you find online: the 2018 reform rewrote the mobile prefixes, so older listings can be flat wrong.
Code +84 was assigned to Vietnam by the ITU under the E.164 plan. The “+” means “dial your local international exit code”; on a mobile, press and hold 0 to type it.
All four mean the same thing — they connect your call to Vietnam.
How to call Vietnam from anywhere
Everything hinges on one move — peel off the domestic trunk "0" once you've added +84. Get that right and the rest falls into place.
Full example: +84 02424 XXX XXXX — drop the local leading 0 when calling from abroad.
Vietnam phone number format explained
At home, a landline is 0 + area code + subscriber number, and a mobile is a clean 10 digits: 0 followed by nine more. From abroad you drop that opening 0 in both cases. The shape you see today is recent — the 2018 reform trimmed mobiles to 10 digits and migrated the old 01xx ranges onto 03, 05, 07 and 08, which is exactly why an older 11-digit number simply won't connect now.
Landline
0 + area code (e.g. 24 Hanoi, 28 HCMC) + 7–8 digit subscriber; internationally +84 24 / +84 28
Mobile
10 digits starting 0 then 3/5/7/8/9 (e.g. 09X XXX XXXX); internationally +84 9X XXX XXXX
Vietnam area codes — major cities
Drop the local leading 0 when calling from abroad.
| City | Region | Area code |
|---|---|---|
| Hanoi | Red River Delta (North) | 02424 |
| Ho Chi Minh City | Southeast (South) | 02828 |
| Da Nang | South Central Coast | 0236236 |
| Hai Phong | Red River Delta | 0225225 |
| Can Tho | Mekong Delta | 0292292 |
| Hue | North Central | 0234234 |
| Nha Trang (Khanh Hoa) | South Central Coast | 0258258 |
| Bien Hoa (Dong Nai) | Southeast | 0251251 |
Vietnam mobile network prefixes
The prefix after +84 tells you which network issued the SIM — though number portability means it no longer guarantees the operator.
Viettel
Vinaphone (VNPT)
Mobifone
Vietnamobile
Vietnam time zone
From Hanoi to Ho Chi Minh City, the whole country keeps one clock: Indochina Time (ICT), UTC+7, with no daylight saving to track. It shares that offset with Bangkok and Jakarta and runs an hour behind Singapore — handy anchors when you're lining up a regional call. The big gaps are with the West: a Vietnamese morning is the previous evening in the Americas.
Emergency numbers in Vietnam
Free to call from any Vietnam phone, landline or mobile.
Common mistakes when calling Vietnam
Almost every failed international call is a formatting issue, not a network issue.
Dialling an old pre-2018 mobile prefix. This is the trap that catches people most: any 11-digit 01xx mobile from before the 2018 reform is dead, having been migrated to a 10-digit 03/05/07/08 number
so a number copied from an old website, card or directory may simply not ring. Always confirm it's in the current format.
Keeping the leading 0 after +84
strip it every time you call from abroad.
Swapping the city codes for Hanoi (24) and Ho Chi Minh City (28)
Swapping the city codes for Hanoi (24) and Ho Chi Minh City (28).
Trusting a mobile prefix to name the carrier
portability means Viettel, Vinaphone and MobiFone numbers can move between networks.
Dropping the area code on a landline and dialling only the subscriber number
Dropping the area code on a landline and dialling only the subscriber number.
Tips to reduce the cost of calling Vietnam
Route calls over VoIP or an MCM virtual number rather than carrier international tariffs into Vietnam.
Hunt for an Asia or international bundle in your plan
many fold Vietnamese minutes into a regional allowance.
Hold a +84 DID so callers in Vietnam reach you at local rates instead of dialling abroad.
Turn on Wi-Fi calling while you're in-country to avoid roaming charges.
Why businesses get a Vietnam virtual number
Vietnam is one of Asia's fastest-growing consumer and manufacturing markets, and with phones near-universal, a +84 line is how you read as a local player rather than an offshore cold caller — especially next to a Hanoi 24 or HCMC 28 footprint.
Higher answer rates
a familiar +84 line gets picked up where a foreign code is screened out.
Lower trust friction
a real Vietnamese DID beats an overseas caller ID at a glance.
Cheaper inbound
callers in Vietnam reach you without per-minute international fees.
Centralized routing
forward those +84 calls to a team anywhere in the world.
Faster expansion
enter the Vietnamese market without leasing a physical office.
Real PSTN presence
a genuine Vietnamese landline or mobile-grade number in the current format.
Vietnam virtual numbers with My Country Mobile
Provision a +84 DID — a Hanoi 24, an HCMC 28, or a current-format mobile-grade line — and route it anywhere on MCM's carrier-grade network.
Local DIDs in major area codes — provisioned in minutes
Call forwarding to any mobile, landline, SIP endpoint, or softphone worldwide
HD voice with G.711, G.729, Opus & AMR-WB — auto-negotiated per call
Sub-150ms latency on major voice corridors via distributed PoPs
99.99% uptime SLA backed by geo-redundant infrastructure & sub-2s failover
WebRTC support for browser-based calling without softphone installs
REST APIs for provisioning, routing & call detail records (CDRs)
Built-in fraud protection with AI anomaly detection & STIR/SHAKEN
24/7 network monitoring and dedicated support
How to get your Vietnam virtual number
Most businesses are live within hours, not days.
Choose Vietnam (+84) and select a Hanoi 24, HCMC 28 or mobile-grade number.
Verify your account and clear any KYC checks.
Point routing or forwarding at your team, softphones or apps.
Go live and start fielding +84 calls.
Other country dialing guides
More country codes worth bookmarking.
Get a Vietnam virtual number with MCM
Claim a Hanoi 24 or HCMC 28 line and start your free trial today.
Vietnam +84 — FAQ
Why won't an old Vietnamese mobile number connect?expand_more
Because of the 2018 reform. Any 11-digit 01xx mobile from before then was retired and migrated to a 10-digit 03/05/07/08 number, so older listings are often out of date — verify it's in the current format.
What exactly changed in the 2018 renumbering?expand_more
Mobiles were shortened from 11 digits to 10, and the legacy 01xx prefixes were remapped onto 03, 05, 07 and 08. Landline area codes were also standardised.
Do I drop the 0 when calling Vietnam from abroad?expand_more
Yes — strip the domestic trunk "0" after +84, every time.
What's the area code for Hanoi and Ho Chi Minh City?expand_more
Hanoi is 24 (dialled 024 at home, +84 24 from abroad); Ho Chi Minh City is 28 (028 at home, +84 28 from abroad).
How do I recognise a current Vietnamese mobile?expand_more
It's 10 digits starting 0 then 3, 5, 7, 8 or 9 — internationally written +84 followed by that prefix without the 0.
Can I tell the operator from a mobile prefix?expand_more
Roughly, but not reliably — Viettel, Vinaphone and MobiFone ranges exist, yet number portability lets numbers shift between them.
How do I call Vietnam from the US?expand_more
Dial 011, then 84, then the number with the leading 0 removed.
Does Vietnam observe daylight saving?expand_more
No. It stays on Indochina Time (UTC+7) all year, matching Bangkok and Jakarta and an hour behind Singapore.