How to call Hanoi in Vietnam from Hong Kong:
001 - Exit code when making an international call from Hong Kong
84 - Vietnamese country code for inbound calls
4 - Hanoi city code
001 + 84 + 4 + Local Number - International dialing code format
World time zone information:
The time in Hong Kong is now 09:09:43 AM (09:09:43 AM)
The time in Hanoi Vietnam is now 08:09:43 AM (08:09:43 AM)
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