Hanoi City area code prefix changes from 04 to 024 starting from 17 June 2017, therefore, UNIS Hanoi telephone number is now changed accordingly .
You will be able to use both the old and the new area codes prefix for a month after the change, then the old code (04) will stop working.
Call us at 024 37581551 from outside Hanoi City or with your mobile phones.
It is not necessary to dial the area code to call within Hanoi using a landline.
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