World Telephone Numbering Guide

Updated 31 December 2009

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Vietnam

+84

Number Format

Area Code:            1-3 digits
Subscriber Number:    7-8 digits (previously 5-7 digits)
Trunk Prefix:         0
International Prefix: 00

Hanoi (+84 4) and Ho Chi Minh City (+84 8) have 8-digit subscriber numbers. All other area codes have 6- or 7-digit subscriber numbers. Some special non-geographic services such as government agencies have 4 to 6 digit subscriber numbers.

Area code information

September 2009 - +84 129 Vinaphone

New Vinaphone number range +84 129 xxxxxxx was introduced since July 2009 numbering list.

Sources: MIC announcement (24 September 2009, via ITU); Vietname Telecom International.

July 2009 - numbering plan update

Number range       Service
------------       -------
+84 121  xxxxxxx   mobile, GSM (VNPT)
+84 122  xxxxxxx   mobile, GSM (VNPT)
+84 123  xxxxxxx   mobile, GSM (VNPT)
+84 126  xxxxxxx   mobile, GSM (VNPT)
+84 164  xxxxxxx   mobile (Viettel)
+84 166  xxxxxxx   mobile (Viettel)
+84 167  xxxxxxx   mobile (Viettel)
+84 168  xxxxxxx   mobile (Viettel)
+84 169  xxxxxxx   mobile (Viettel)
+84 1800 xxxx(xx)  freephone service
+84 1900 xxxx(xx)  premium service
+84 199  xxxxxxx   mobile (Beeline NV/GTEL)
+84 199  xxxx      Foreign Affairs Ministry
+84 20   xxxxxxx   Lao Cai province
+84 210  xxxxxxx   Phu Tho province
+84 211  xxxxxxx   Vinh Phu province
+84 218  xxxxxxx   Hoa Binh province
+84 219  xxxxxx    Ha Giang province
+84 22   xxxxxxx   Son La province
+84 230  xxxxxxx   Dien Bien province
+84 231  xxxxxxx   Lai Chau province
+84 240  xxxxxxx   Bac Giang province
+84 241  xxxxxxx   Bac Ninh province
+84 25   xxxxxxx   Lang Son province
+84 26   xxxxxxx   Cao Bang province
+84 27   xxxxxxx   Tuyen Quang province
+84 280  xxxxxxx   Thai Nguyen province
+84 281  xxxxxxx   Bac Can province
+84 29   xxxxxxx   Yen Bai province
+84 30   xxxxxxx   Ninh Binh province
+84 31   xxxxxxx   Hai Phong province
+84 320  xxxxxxx   Hai Duong province
+84 321  xxxxxxx   Hung Yen province
+84 33   xxxxxxx   Quang Ninh province
+84 350  xxxxxxx   Nam Dinh province
+84 351  xxxxxxx   Ha Nam province
+84 36   xxxxxxx   Thai Binh province
+84 37   xxxxxxx   Thanh Hoa province
+84 38   xxxxxxx   Nghe An province
+84 39   xxxxxxx   Ha Tinh province
+84 4    xxxxxxxx  Hanoi (Ha Noi City)
+84 500  xxxxxxx   Dac Lac province
+84 501  xxxxxxx   Dac Nong province
+84 510  xxxxxxx   Quang Nam province
+84 511  xxxxxxx   Da Nang province
+84 52   xxxxxxx   Quang Binh province
+84 53   xxxxxxx   Quang Tri province
+84 54   xxxxxxx   Thua Thien Hue province
+84 55   xxxxxxx   Quang Ngai province
+84 56   xxxxxxx   Binh Dinh province
+84 57   xxxxxxx   Phu Yen province
+84 58   xxxxxxx   Khanh Hoa province
+84 59   xxxxxxx   Gia Lai province
+84 60   xxxxxxx   Kon Tum province
+84 61   xxxxxxx   Dong Nai province
+84 62   xxxxxxx   Binh Thuan province
+84 63   xxxxxxx   Lam Dong province
+84 64   xxxxxxx   Ba Ria-Vung Tau province
+84 650  xxxxxxx   Binh Duong province
+84 651  xxxxxxx   Binh Phuoc province
+84 66   xxxxxxx   Tay Ninh province
+84 67   xxxxxxx   Dong Thap province
+84 68   xxxxxxx   Ninh Thuan province
+84 69   xxxxx(x)  Ministries of National Defense and Home Affairs
+84 70   xxxxxxx   Vinh Long province
+84 710  xxxxxxx   Can Tho province
+84 711  xxxxxxx   Hau Giang province
+84 72   xxxxxxx   Long An province
+84 73   xxxxxxx   Tien Giang province
+84 74   xxxxxxx   Tra Vinh province
+84 75   xxxxxxx   Ben Tre province
+84 76   xxxxxxx   An Giang province
+84 77   xxxxxxx   Kien Giang province
+84 780  xxxxxxx   Ca Mau province
+84 781  xxxxxxx   Bac Lieu province
+84 79   xxxxxxx   Soc Trang province
+84 799  xxxx      Foreign Affairs Ministry
+84 8    xxxxxxxx  Ho Chi Minh City
+84 80   xxxxx     Central Post and Telecom Division
+84 90   xxxxxxx   mobile (VNPT Mobifone)
+84 91   xxxxxxx   mobile (VNPT Vinafone)
+84 92   xxxxxxx   mobile, CDMA (HTC)
+84 93   xxxxxxx   mobile (VNPT Mobifone) - since 1 June 2006
+84 94   xxxxxxx   mobile (VNPT Vinafone) - since 15 September 2006
+84 95   xxxxxxx   mobile, CDMA (SPT)
+84 96   xxxxxxx   mobile, CDMA (EVN)
+84 97   xxxxxxx   mobile (Viettel)
+84 98   xxxxxxx   mobile (Viettel)
+84 99   xxxxxx    VSAT

Source: MIC announcement (9 July 2009, via ITU, superseded Sept 2009)

5 October 2008 - national numbering expansion

Existing subscriber numbers were expanded by a digit on 5 October 2008. In Hanoi and Ho Chi Minh City, existing 7-digit subscriber numbers became 8-digit format, while in other regions existing 6-digit subscriber numbers became 7-digit. Permissive use of old format numbers was allowed until 1 November 2008 (or for some regions and carriers, the mandatory use of new format was introduced as early as 26 October 2008).

The extra digit was prepended to the subscriber number portion (after any area code). In the following table, "a" represents a single-digit area code (Hanoi, Ho Chi Minh), "aa" a 2-digit area code, "aaa" a 3-digit area code:

Carrier                        Old format      New format 
-------                        ----------      ----------
EVN                            +84 a xxxxxxx   +84 a 2xxxxxxx
EVN                            +84 aa xxxxxx   +84 aa 2xxxxxx
EVN                            +84 aaa xxxxxx  +84 aaa 2xxxxxx

VNPT (Vietnam Post & Telecomm) +84 a xxxxxxx   +84 a 3xxxxxxx
VNPT (Vietnam Post & Telecomm) +84 aa xxxxxx   +84 aa 3xxxxxx
VNPT (Vietnam Post & Telecomm) +84 aaa xxxxxx  +84 aaa 3xxxxxx

VTC (Vietnam Multimedia Corp)  +84 a xxxxxxx   +84 a 4xxxxxxx
VTC (Vietnam Multimedia Corp)  +84 aa xxxxxx   +84 aa 4xxxxxx
VTC (Vietnam Multimedia Corp)  +84 aaa xxxxxx  +84 aaa 4xxxxxx

SPT (Saigon Postel Corp)       +84 a xxxxxxx   +84 a 5xxxxxxx
SPT (Saigon Postel Corp)       +84 aa xxxxxx   +84 aa 5xxxxxx
SPT (Saigon Postel Corp)       +84 aaa xxxxxx  +84 aaa 5xxxxxx

Viettel Telecom                +84 a xxxxxxx   +84 a 6xxxxxxx
Viettel Telecom                +84 aa xxxxxx   +84 aa 6xxxxxx
Viettel Telecom                +84 aaa xxxxxx  +84 aaa 6xxxxxx

A few regions were annexed into Hanoi's +84 4 area code by 1 November 2008:

Ha Tay - the previous area code +84 34 was replaced with +84 4 and subscriber numbers were prepended with an extra digit based on carrier.
Me Linh area of Vinh Phuc province - +84 211 was replaced with +84 4. Existing VNPT subscriber numbers of form +84 211 5xxxxx became +84 4 352xxxxx (digit '2' inserted after the '5'; new leading digit '3' for carrier VNPT). Existing VNPT subscriber numbers of form +84 211 8xxxxx became +84 4 381xxxxx (digit '1' inserted after the '8'; new leading digit '3' for carrier VNPT).
Luong Son area of Hoa Binh province - +84 218 was replaced with +84 4. Carrier digit then digit '9' were prepended to existing subscriber numbers; for example, VNPT carrier numbers of form +84 4 820xxxxx or +84 4 821xxxxx became +84 4 39820xxxxx or +84 4 39821xxxxx respectively.

Other areas of Vinh Phuc and Hoa Binh provinces retained the existing area codes; their subscriber numbers were subject to the added carrier digit under the general national renumbering.

For some area codes, no expansion of subscriber numbers was indicated for October 2008 and are indicated as such in the following table.

Old format       New format       Locality
----------       ----------       --------
+84 20 xxxxxx    +84 20 xxxxxxx   Lao Cai
+84 210 xxxxxx   +84 210 xxxxxxx  Phu Tho
+84 211 xxxxxx   +84 211 xxxxxxx  Vinh Phuc (Me Linh district moved to +84 4)
+84 218 xxxxxx   +84 218 xxxxxxx  Hoa Binh (Luong Son district moved to +84 4)
+84 219 xxxxxx   +84 219 xxxxxxx  Ha Giang
+84 22 xxxxxx    +84 22 xxxxxxx   Son La
+84 230 xxxxxx   +84 230 xxxxxxx  Dien Bien
+84 231 xxxxxx   +84 231 xxxxxxx  Lai Chau
+84 240 xxxxxx   +84 240 xxxxxxx  Bac Giang
+84 241 xxxxxx   +84 241 xxxxxxx  Bac Ninh
+84 25 xxxxxx    +84 25 xxxxxxx   Lang Son
+84 26 xxxxxx    +84 26 xxxxxxx   Cao Bang
+84 27 xxxxxx    +84 27 xxxxxxx   Tuyen Quang
+84 280 xxxxxx   +84 280 xxxxxxx  Thai Nguyen
+84 281 xxxxxx   +84 281 xxxxxxx  Bac Can
+84 29 xxxxxx    +84 29 xxxxxxx   Yen Bai
+84 30 xxxxxx    +84 30 xxxxxxx   Ninh Binh
+84 31 xxxxxxx   (no changes)     Hai Phong
+84 320 xxxxxxx  (no changes)     Hai Duong
+84 321 xxxxxx   +84 321 xxxxxxx  Hung Yen
+84 33 xxxxxx    +84 33 xxxxxxx   Quang Ninh
+84 34 xxxxxx    +84 4 xxxxxxxx   Ha Tay
+84 350 xxxxxxx  (no changes)     Nam Dinh
+84 36 xxxxxxx   (no changes)     Thai Binh
+84 37 xxxxxxx   (no changes)     Thanh Hoa
+84 38 xxxxxxx   (no changes)     Nghe An
+84 351 xxxxxx   +84 351 xxxxxxx  Ha Nam
+84 36 xxxxxx    +84 36 xxxxxxx   Thai Binh
+84 39 xxxxxx    +84 39 xxxxxxx   Ha Tinh
+84 4 xxxxxxx    +84 4 xxxxxxxx   Hanoi (Ha Noi)
+84 500 xxxxxx   +84 500 xxxxxxx  Dac Lac
+84 501 xxxxxx   +84 501 xxxxxxx  Dac Nong
+84 510 xxxxxx   +84 510 xxxxxxx  Quang Nam
+84 511 xxxxxxx  (no changes)     Da Nang
+84 52 xxxxxx    +84 52 xxxxxxx   Quang Binh
+84 53 xxxxxx    +84 53 xxxxxxx   Quang Tri
+84 54 xxxxxx    +84 54 xxxxxxx   Thua Thien Hue
+84 55 xxxxxx    +84 55 xxxxxxx   Quang Ngai
+84 56 xxxxxx    +84 56 xxxxxxx   Binh Dinh
+84 57 xxxxxx    +84 57 xxxxxxx   Phu Yen
+84 58 xxxxxx    +84 58 xxxxxxx   Khanh Hoa
+84 59 xxxxxx    +84 59 xxxxxxx   Gia Lai
+84 60 xxxxxx    +84 60 xxxxxxx   Kon Tum
+84 61 xxxxxxx   (no changes)     Dong Nai
+84 62 xxxxxx    +84 62 xxxxxxx   Binh Thuan
+84 63 xxxxxx    +84 63 xxxxxxx   Lam Dong
+84 64 xxxxxx    +84 64 xxxxxxx   Ba Ria Vung Tau
+84 650 xxxxxx   +84 650 xxxxxxx  Binh Duong
+84 651 xxxxxx   +84 651 xxxxxxx  Binh Phuoc
+84 66 xxxxxx    +84 66 xxxxxxx   Tay Ninh
+84 67 xxxxxx    +84 67 xxxxxxx   Dong Thap
+84 68 xxxxxx    +84 68 xxxxxxx   Ninh Thuan
+84 69 xxxxx(x)  (no changes)     National Defense/Home Affairs network
+84 70 xxxxxx    +84 70 xxxxxxx   Vinh Long
+84 710 xxxxxx   +84 710 xxxxxxx  Can Tho
+84 711 xxxxxx   +84 711 xxxxxxx  Hau Giang
+84 72 xxxxxx    +84 72 xxxxxxx   Long An
+84 73 xxxxxx    +84 73 xxxxxxx   Tien Giang
+84 74 xxxxxx    +84 74 xxxxxxx   Tra Vinh
+84 75 xxxxxx    +84 75 xxxxxxx   Ben Tre
+84 76 xxxxxx    +84 76 xxxxxxx   An Giang
+84 77 xxxxxxx   (no changes)     Kien Giang
+84 780 xxxxxx   +84 780 xxxxxxx  Ca Mau
+84 781 xxxxxx   +84 781 xxxxxxx  Bac Lieu
+84 79 xxxxxx    +84 79 xxxxxxx   Soc Trang
+84 8 xxxxxxx    +84 8 xxxxxxxx   Ho Chi Minh City
+84 80 xxxxx     (no changes)     Central Post and Telecom Division
+84 90 xxxxxxx   (no changes)     VNPT Mobifone
+84 91 xxxxxxx   (no changes)     VNPT Vinaphone
+84 92 xxxxxxx   (no changes)     HTC (CDMA mobile)
+84 93 xxxxxxx   (no changes)     VNPT Mobifone (as of 1 June 2006)
+84 94 xxxxxxx   (no changes)     VNPT Vinaphone (as of 15 September 2006)
+84 95 xxxxxxx   (no changes)     SPT (CDMA mobile)
+84 96 xxxxxxx   (no changes)     EVN (CDMA mobile)
+84 97 xxxxxxx   (no changes)     Viettel mobile
+84 98 xxxxxxx   (no changes)     Viettel mobile
+84 99 xxxxxx    (no changes)     VSAT

Sources: Ministry of Information and Communications (MIC) announcements (via ITU, 4 September 2008, 10 October 2008)

New dialing mode applied to the fixed telephone number in Vietnam (CTM, 3 October 2008)

(News courtesy Sergiu Rosenzweig)

1 October 2006 - subscriber numbers expanded in certain areas

'3' was prepended to 6-digit subscriber numbers in certain regions to form new 7-digit subscriber numbers. This was not a widespread or national renumbering. There was a one month permissive dialling period which ended 1 November 2006.

Old format     New format      Place
----------     ----------      -----
+84 31 xxxxxx  +84 31 3xxxxxx  Hai Phong City
+84 38 xxxxxx  +84 38 3xxxxxx  Nghe An province
+84 61 xxxxxx  +84 61 3xxxxxx  Dong Nai province

Source: MIC announcement (26 September 2007, via ITU) (News courtesy Sergiu Rosenzweig)

15 September 2006 - new Vinaphone mobile range

Vinaphone mobile numbers were assigned the new number range +84 94 xxxxxxx.

Source: MIC announcement (26 September 2007, via ITU) (News courtesy Sergiu Rosenzweig)

May 2004 - numbering plan

As of May 2004, the following applies in Vietnam:

Subscriber numbers (regardless of area code) belong to carriers according to the following pattern:

Number range   Local Carrier
============   =============
2xxxxxx        Viettel
4xxxxxx        Saigon Postel Telecom (SPT)
5xxxxxx        Viet Nam Posts and Telecommunications Corporation (VNPT)
6xxxxxx        Viet Nam Posts and Telecommunications Corporation (VNPT)
7xxxxxx        Viet Nam Posts and Telecommunications Corporation (VNPT)
8xxxxxx        Viet Nam Posts and Telecommunications Corporation (VNPT)
9xxxxxx        Viet Nam Posts and Telecommunications Corporation (VNPT)

Mobile area codes are as follows:

Number range     Mobile carrier
============     ==============
+84 90 xxxxxxx   MobiFon
+84 91 xxxxxxx   VinaPhone
+84 95 xxxxxxx   S-Fone (new carrier)

1xxx short codes are for home country direct, data, internet, special and premium services. 171 is VOIP short code (Voice Over Internet Protocol).

Source: Viet Nam Posts and Telecommunications Corporation (VNPT) announcement, (27 May 2004, via ITU)..

15 February 2004 - new VinaPhone subscriber number range

+84 91 27xxxxx, +84 91 42xxxxx, +84 91 90xxxxx are new VinaPhone mobile number ranges from 15 February 2004.

1 January 2004 - new MobiFon subscriber number range

+84 90 90xxxxx is a new MobiFon range from 1 January 2004.

1 June 2001 - GSM mobile subscriber number expansion

On 1 June 2001, GSM mobile subscriber numbers on area codes +84 90 (MobiFone) and +84 91 (VinaPhone) were expanded from 6 to 7 digits by prepending the digit '3'.

Sources:

1. VNPT Announcement.

2. VNPT announcement (via ITU, 2001).

10 October 1999 - Hung Yen and Hai Duong area codes change

From 10 October 1999, Hai Duong provincial area code became +84 320 (0320 domestically) and Hung Yen provincial area code became +84 321 (0321 domestically). These replace the area code +84 32 (or 032 domestically) which covered both provinces until that time.

This change was implemented with the installation of an NEAX 61S telephone switch in Hung Yen. The area code changes also reflect the political split of the Hai Hung province into Hai Duong and Hung Yen provinces as of 1 July 1997.

See VNPT press release for details.

12 September 1999 - Binh Duong and Binh Phuoc area codes change

From 12 September 1999, Binh Duong provincial area code became +84 650 (0650 domestically) and Binh Phuoc provincial area code became +84 651 (0651 domestically). These replace the area code +84 65 (or 065 domestically) which covered both provinces until that time.

See VNPT press release for details.

1 April 1999 - Vinh Phuc and Phu Tho area codes change

From 1 April 1999, Vinh Phuc provincial area code became +84 211 (0211 domestically) and Phu Tho provincial area code became +84 210 (0210 domestically). These replace the area code +84 21 (or 021 domestically) which covered both provinces until that time. 6-digit subscriber numbers were not changed.

See VNPT press release for details.

October 1998 - Sufficient advance notice policy for number changes

Telephone subscribers are to be given at least 60 days notice for any numbering changes, according to policy decreed 16 October 1998.

See VNPT press release for details.

29 February 1996: national renumbering

Vietnam's telephone numbers were expanded by 1 digit nationally on 29 February 1996. Subscriber numbers in Hanoi and Ho Chi Minh City were changed from 6 to 7 digits. Elsewhere, subscriber numbers changed from 5 to 6 digits. No other details on the renumbering are known.

Source: VNPT 1996 news summary.

Other Information

Regulator is Ministry of Information and Communications (MIC)

See Vietnam Posts and Telecommunication Corp. site for news and information.

International carrier is Vietname Telecom International (VTI).

Also see numbering document (via ITU).

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