 How to call:
011 - Exit code when making an international call from Puerto Rico
84 - Vietnamese country code for inbound calls
4 - Hanoi city code
011 + 84 + 4 + Local Number - International dialing code format
 World Times:
The time in Puerto Rico is now 23:13:06 PM (11:13:06 PM)
The time in Hanoi Vietnam is now 10:13:06 AM (10:13:06 AM)
 Mobile codes:
To call a mobile phone in Vietnam from Puerto Rico use the following dialing code format: 011 + 84 + 9# + The Number
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