🇻🇳USA to Vietnam Calling Guide

Call Vietnam
Country Code +84

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How to Dial
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How to Call Vietnam from USA

Dialing Vietnam is simple. Just remember to use the international exit code and drop the leading zero.

1

US Exit Code

Dial 011. This is the exit code for the USA and Canada.
(On mobile/VoIP, just use +)

2

Vietnam Code (+84)

Dial +84. This connects you to the Vietnamese telecom network.

3

Area Code & Number

Enter the city code or mobile prefix.Important: Drop the leading zero!

Dialing Examples

Vietnam area codes (like 028 for HCM) and mobile prefixes (like 096 for Viettel) start with '0'. Always remove this zero when calling from the USA.

Landline (Ho Chi Minh)
+84 028 3829 0000
Mobile (Viettel)
+84 096 123 4567

Vietnam City Codes

Common area codes for major Vietnamese cities. Remember to drop the '0'.

CityRegionArea Code
Ho Chi Minh City (Saigon)South028
HanoiNorth024
Da NangCentral0236
Hai PhongNorth0225
Can ThoSouth0292
CityRegionArea Code
Dong NaiSouth0251
Binh DuongSouth0274
Nha Trang (Khanh Hoa)Central0258
Hue (Thua Thien-Hue)Central0234
Vung TauSouth0254
Mobile Networks

Vietnam Mobile Prefixes

Identify the carrier by the prefix. Dial +84 followed by these numbers (dropping the first 0).

096 / 097 / 098 / 086
Viettel (Largest Network)
091 / 094 / 088
Vinaphone
090 / 093 / 089
Mobifone
092 / 056 / 058
Vietnamobile

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Call 24/7. Vietnam is roughly 12 hours ahead of US EST.

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Frequently Asked Questions

What is the country code for Vietnam?

The country calling code for Vietnam is +84. You must dial this after the US exit code (011) and before the area code.

How do I call a mobile number in Vietnam?

Vietnam mobile numbers are 10 digits long and start with 03, 05, 07, 08, or 09. When calling from the USA, drop the leading '0'. Dial +84 followed by the 9-digit mobile number.

What is the area code for Ho Chi Minh City?

The area code for Ho Chi Minh City (Saigon) is 028. When dialing from abroad, drop the zero and dial +84 28.

Can I call Vietnam for free?

StartACall offers a free trial for new users to test call quality. Continued calling is available at very low pay-as-you-go rates, much cheaper than traditional carriers.

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Country deep dive

From United States to Vietnam

Practical reference covering the destination country's dial code, time zone, mobile carriers, city area codes, business etiquette, and any regulatory rules that affect inbound calls. The information below is specific to this route — different country pairs surface different operational details.

Calling Vietnam (+84)

Vietnam sits in ICT (UTC+7) — no daylight saving.. The country dial code is +84 and the official language for business is Vietnamese. Local business hours run roughly 8:00–17:30 with a long lunch 11:30–13:30. Many offices observe a nap break..

Major cities & area codes

  • Da Nang · 236
  • Ho Chi Minh City · 28
  • Hanoi · 24

Mobile carriers in Vietnam

  • MobiFone · 89, 90, 93, 70-79
  • Viettel · 86, 96, 97, 98, 32-39Military-owned; ~50% market
  • Vinaphone (VNPT) · 88, 91, 94, 81-85

What to know when calling Vietnam

  • Vietnam restructured all mobile prefixes in 2018 — 0120-series became 070-079, 0121 became 079, etc. Older databases may have outdated prefixes.

Calling from United States

From United States (Five time zones from Eastern (UTC−5) to Hawaii–Aleutian (UTC−10); most business activity sits in Eastern and Pacific.) the local business window is Standard hours 9:00–17:00 in each local time zone. Federal offices skew earlier; West-Coast tech routinely runs to 19:00. Banks close 17:00 sharp.. Most outbound callers reach a live answer most easily mid-morning local time, before lunch, and again in the late afternoon.

  • Voicemail is widely used and read by transcription; leaving a brief callback request often gets faster response than re-dialing.
  • Cold-call regulations vary by state — California, Florida and New York have stricter pre-recorded-message rules under their consumer protection acts.
Operational facts above are sourced from regulator publications and carrier disclosures; specific rates and routing are confirmed in the live dialer.
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