Dialing from oversea = 84 (Vietnam code) + City Code + phone number

Dialing from inside Vietnam: 0 + City Code + Phone number

Vietnamese City Code:

An Giang	76
Ba Ria - Vung Tau	64
Bac Giang	240
Bac Kan	281
Bac Lieu	781
Bac Ninh	241
Ben Tre	75
Binh Dinh	56
Binh Duong	650
Binh Phuoc	651
Binh Thuan	62
Ca Mau	780
Can Tho	71
Cao Bang	26
Da Nag	511
Dak Lak	50
Dong Nai	61
Dong Thap	67
Gia Lai	59
Ha Giang	19
Ha Nam	351
Ha Tay	34
Ha Tinh	39
Hai Duong	320
Hai Phong	31
Hanoi	4
Ho Chi Minh City	8
Hoa Binh	18
Home Affairs and Defence Ministry	69
Hung Yen	321
Khanh Hoa	58
Kien giang	77
Kon Tum	60
Lai Chau	23
Lam Dong	63
Lang Son	25
Lao cai	20
Long An	72
Nam Dinh	350
Nghe An	38
Ninh Binh	30
Ninh Thuan	68
Phu Tho	210
Phu Yen	57
Quang Binh	52
Quang Nam	510
Quang Ngai	55
Quang Ninh	33
Quang Tri	53
Soc Trang	79
Son La	22
Tay Ninh	66
Thai Binh	36
Thai Nguyen	280
Thanh Hoa	37
Thua Thien Hue	54
Tien Giang	73
Tra Vinh	74
Tuyen Quang	27
Vinh Long	70
Vinh Phuc	211
Yen Bai	29