 How to call:
011 - Exit code when making an international call from Guam
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 Guam is now 21:31:05 PM (09:31:05 PM)
The time in Hanoi Vietnam is now 18:31:05 PM (06:31:05 PM)
 Mobile codes:
To call a mobile phone in Vietnam from Guam use the following dialing code format: 011 + 84 + 9# + The Number
| 
