Vietnam country code +84: how to dial in, out and at home

The +84 code, the dropped 0, and what a Vietnamese number's digits and codes mean.

By the Local SIM Vietnam team, checked October 2, 2026

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The short answer

Vietnam's country code is +84. From abroad, dial +84 and drop the first 0 of the number: a mobile written 09X XXX XXXX becomes +84 9X XXX XXXX. To call another country from Vietnam, dial 00, or + on a mobile, then the country code. A Vietnamese mobile has ten digits at home, nine after +84.

+84 is the country code; the 0 in front is the trunk prefix, dropped from abroad.
Mobiles at home: ten digits, starting 03, 05, 07, 08 or 09.
Calling out of Vietnam: 00, or + on a mobile, then the country code.
A Vietnamese SIM identity starts 8984; its network identity starts with 452.

Checked October 2, 2026

Dialling, at a glance

You want to call	Dial
A Vietnamese mobile from abroad	+84 9X XXX XXXX, no 0
A Hanoi landline from abroad	+84 24, then the number
A Vietnamese mobile inside Vietnam	09X XXX XXXX, as written
Another country from Vietnam	00 or +, then the country code

A Vietnamese mobile from abroad
Dial
+84 9X XXX XXXX, no 0
A Hanoi landline from abroad
Dial
+84 24, then the number
A Vietnamese mobile inside Vietnam
Dial
09X XXX XXXX, as written
Another country from Vietnam
Dial
00 or +, then the country code

The codes your phone shows

MCC 452
Vietnam's mobile country code. A Vietnamese network identity begins with 452, followed by the operator's own network code.
ICCID starting 8984
A SIM's serial number begins with 89, for telecom, then 84, the country code. Vietnamese issuers sit in the 89 84 range.
Old numbers
Eleven-digit numbers beginning 01 became ten digits in 2018: 0162 became 032, and 0120 became 070. If a saved number starts +84 1, ask for the current one.

The bottom line

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Questions

What is the Vietnam country code?

It is +84. From abroad, drop the first 0 of a Vietnamese number: 09X XXX XXXX is dialled +84 9X XXX XXXX. Inside Vietnam, dial the number as written, with its 0.