International dialing
How to call Vietnam from United States
- Exit code 011
- Country code +84
- Drop the leading 0
Reviewed by Sujan ThapaliyaLast updated
Calling Vietnam from United States
Dial 011 (the United States exit code), then 84 (Vietnam’s country code), then the local number with its leading 0 removed. So +84 24 1234 5678 is dialled as 011 84 24 1234 5678. From a mobile you can dial +84 directly instead of 011.
The dialing sequence
- Exit code from United States
- 011
- Vietnam country code
- +84
- Trunk prefix to remove
- 0
- Domestic numbers start with 0; drop it from abroad.
- Full sequence
- 011 + 84 + local number (drop the leading 0)
- Time in Vietnam
- ICT (UTC+7, no DST)
- United States is on ET (UTC−5/−4).
Step by step
Dialing Vietnam from United States
Four steps, and the third one is where almost every failed call goes wrong.
- 1
Dial 011: the exit code for United States
011 tells the United States network that the call is leaving the country. On a mobile you can press and hold 0 to type a + instead, which works from any country and any SIM; it is the more reliable option when you travel. - 2
Dial 84: the country code for Vietnam
84 is Vietnam's country calling code. It never changes and is the same no matter where you are calling from. - 3
Drop the leading 0 from the local number
Numbers written for domestic use in Vietnam begin with 0. That digit is a national trunk prefix and is not part of the number. Remove it: +84 24 1234 5678 is dialled as 24 1234 5678 after the country code. - 4
Check the local time before you dial
Vietnam is on ICT (UTC+7, no DST) and United States is on ET (UTC−5/−4). Work out the overlap before calling; the most common cause of an unanswered international business call is simply the hour.
Worked examples
What the number looks like at each stage
These are format patterns showing digit grouping, not working numbers.
| Written in Vietnam | Dialed from United States | |
|---|---|---|
| Landline | 024 1234 5678 | 011 84 24 1234 5678 |
| Mobile | +84 [39875]X XXX XXXX | 011 84 91 234 5678 |
| From a mobile (+) | n/a | +84 91 234 5678 |
Frequently asked questions
How do I call Vietnam from the United States?
Dial 011, then 84, then the local number with its leading 0 removed. For example, +84 24 1234 5678 is dialled as 011 84 24 1234 5678.
What is the country code for Vietnam?
+84. From United States you reach it by dialling 011 first, or by dialling + directly from a mobile.
Do I include the 0 when calling Vietnam?
No. The leading 0 is only used inside Vietnam. Including it from abroad is the most common reason the call fails to connect.
How do I call a Vietnam mobile from United States?
Exactly the same way as a landline: 011 + 84 + the mobile number without its leading 0. A Vietnam mobile in international format looks like +84 91 234 5678.
What is the time difference between United States and Vietnam?
United States is on ET (UTC−5/−4) and Vietnam is on ICT (UTC+7, no DST). Because several of these zones observe daylight saving on different dates, check the current offset rather than assuming a fixed gap.
Is it cheaper to call Vietnam over the internet?
Usually, yes. Carrier international rates are typically far above VoIP per-minute rates, and calling from an owned local number also means the person you are calling sees a number they can ring back.
Sources
- ITU-T Recommendation E.164 — The international public telecommunication numbering plan — International Telecommunication UnionThe international number format, the 15-digit maximum, and how country codes and national numbers compose.
- ITU-T International Numbering Resources — International Telecommunication UnionThe assignment of country calling codes and the published national numbering plans they belong to.
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