Area code changes in Ho Chi Minh City, Hanoi, Dong Nai, Binh Duong, and a number of other provinces will take place on June 17, 2017.
The new area codes will be applied for 59 cities and provinces in three phases, from February 11 to June 17, with steps taken to ensure the change will not confuse the public, the Ministry of Information and Communications announced. But there are other concerns, such as the need to reprint packaging or business cards once numbers are changed, costing quite a sum.
In Vietnam, a landline phone number reads as follows: (country code) (area code) (phone number). The country code is +84 but it is not necessary to dial the area code to call within a city or province.
According to the ministry, the area code change is necessary as the current codes are inconsistent, with “some provinces having a three-digit area code while others have one- or two-digit codes.”
Vietnam to apply extensive area code changes in 2017, Nov 23, 2017