+84 mobile numbers: Vietnam's prefixes, the 2018 renumbering and spam reporting

A +84 number with nine digits after the country code that begins with 3, 5, 7, 8 or 9 is a Vietnamese mobile number, for example +84 32X XXX XXX on Viettel or +84 91X XXX XXX on VinaPhone. Since 2018 every Vietnamese mobile number has 10 digits locally, and mobile number portability means the prefix shows only the original network.

Vietnam · Mobile numbers · Facts checked November 9, 2026

What these numbers look like

From abroad: +84 9X XXX XXXX
Inside Vietnam: 09X XXX XXXX

Locally a mobile number is 10 digits starting 0 (e.g. 032, 086, 091). From abroad drop the 0 after +84. Any 11-digit 01XX mobile number you have saved is from before 2018 and no longer connects.

Who uses +84 mobile numbers?

Mobile network codes were assigned by the Ministry of Information and Communications (MIC), which merged into the Ministry of Science and Technology on 1 March 2025. Under MIC Decision 798/QĐ-BTTTT (25 May 2018), all 11-digit mobile numbers were converted to 10 digits from 15 September 2018: the last seven digits stayed the same and only the network code changed. Viettel 0162-0169 became 032-039; MobiFone 0120, 0121, 0122, 0126, 0128 became 070, 079, 077, 076, 078; VinaPhone 0123, 0124, 0125, 0127, 0129 became 083, 084, 085, 081, 082; Vietnamobile 0186 and 0188 became 056 and 058; Gmobile 0199 became 059. Old and new codes both worked until 14 November 2018, then a recorded announcement played until 30 June 2019. Existing 10-digit 09x numbers did not change. Mobile number portability (Circular 35/2017/TT-BTTTT) began on 16 November 2018 for postpaid and 1 January 2019 for prepaid subscribers.

Prefix	Operator	Note
086, 096, 097, 098, 032-039	Viettel	032-039 were 0162-0169 before 2018
088, 091, 081-085	VinaPhone (VNPT)	081-085 were 0127, 0129, 0123, 0124, 0125
089, 090, 070, 076-079	MobiFone	070/076-079 were 0120/0126/0122/0128/0121
056, 058	Vietnamobile	Were 0186 and 0188
059	Gmobile (Gtel)	Was 0199
087	Itelecom	Virtual operator on VinaPhone's network, launched 2019

Who is calling you from a +84 mobile number?

Most +84 calls are from ordinary Vietnamese subscribers: family, delivery drivers, hotels and tour operators, and local businesses. The common scam pattern is a caller impersonating a state agency, the police or your mobile network and asking for personal data or OTP codes.

Scams seen with +84 mobile numbers

'Your SIM will be locked' calls: the Ministry of Public Security and Ho Chi Minh City police warned about callers posing as network staff who threaten to cut off both incoming and outgoing service unless the subscriber 'standardises' their registration details. They then walk victims through call-forwarding codes or a SIM ownership change to capture bank and e-wallet OTPs.
Impersonation of state agencies: the government's 156 reporting line was set up in November 2022 specifically for spam calls and calls that pose as state agencies or organisations to take people's money.

What to do about a call from +84 mobile

Report spam or scam calls and texts free of charge to 156 or 5656 from a Vietnamese SIM. Text formats: S [number] [content] for spam SMS, V [number] [content] for spam calls, LD [number] [content] for suspected scam calls. You can also call 156.
Opt out of advertising messages by texting DK DNC to 5656 (cancel with HUY DNC).
Never dial codes a caller tells you to enter; many SIM-lock scams start by setting up call forwarding.
Subscriber verification is done only through VNeID, your network's official app, or a network store, never over an unsolicited call.
If you already gave details, call your bank and network to lock accounts and report to the nearest police station.

Check the exact number

A series tells you what kind of line called. To check the full number you got, use these free tools:

Phone number validator: which country, mobile or landline, and whether the length is right.
Spam number checker: warning signs that a caller is a scammer.
Who called me? Reverse phone lookup: what the number tells you about the caller.
Vietnam country code +84: full dialing guide and number formats.
Calling Vietnam from abroad: per-minute rates if you need to call someone there.

Frequently asked questions

What did 0162 change to?

Viettel's 0162 became 032 in 2018. The pattern for Viettel is 0162-0169 to 032-039, keeping the last seven digits.

What network is +84 86?

086 was assigned to Viettel in February 2016. With number portability, the number may now be on another network.

Why does my old Vietnamese number with 11 digits not work?

All 11-digit mobile numbers were converted to 10 digits between September 2018 and June 2019. Replace the old 01XX code with the new code from the table above.

How do I report a spam call in Vietnam?

Text V followed by the caller's number and a short description to 156 or 5656, or LD for a suspected scam. The service is free.

Sources

Numbering facts on this page come from the regulator or operator sources below, checked November 9, 2026. We never publish individual personal phone numbers.

Ministry of Information and Communications - Kế hoạch chuyển đổi mã mạng (conversion plan, now hosted by MST) (mic.gov.vn)
Decision 798/QĐ-BTTTT (25 May 2018) network code conversion plan, English text (thuvienphapluat.vn)
VietNamNet - Bảng tổng hợp đổi 11 số thành 10 số các nhà mạng (full mapping table) (vietnamnet.vn)
Ministry of Science and Technology (ex-MIC) English - 11-digit phone numbers to be cut (21 Dec 2017) (english.mst.gov.vn)
Ministry of Science and Technology - Two deputy ministers appointed (merged ministry operating from 1 March 2025) (english.mst.gov.vn)
Báo Chính phủ - Bộ TT&TT hướng dẫn cách chuyển mạng giữ số (MNP from 16 Nov 2018 / 1 Jan 2019) (baochinhphu.vn)
MST - Thông tư 35/2017/TT-BTTTT on mobile number portability (mst.gov.vn)
Viettel International - Viettel launches new mobile prefix (+84) 868 / prefixes 96, 97, 98 (international.viettel.vn)
VietNamNet - Viettel tung đầu số di động 086 (licensed 26 Feb 2016) (vietnamnet.vn)
VietNamNet - MobiFone được cấp đầu số mới 089 (vietnamnet.vn)
Tuoi Tre News - First mobile virtual network launched in Vietnam (Itelecom, 087) (tuoitrenews.vn)
Chính phủ - Từ 1/11 triển khai thí điểm tổng đài 156 (reporting syntax S/V/LD, free) (xaydungchinhsach.chinhphu.vn)
Báo Chính phủ - Hướng dẫn chống tin nhắn rác, cuộc gọi rác (DK DNC to 5656) (baochinhphu.vn)
Ho Chi Minh City government - Cảnh báo thủ đoạn đe dọa khóa SIM điện thoại để lừa đảo (tphcm.chinhphu.vn)
Bộ Công an - Kiến nghị về phòng ngừa tội phạm lừa đảo qua mạng (impersonation of network staff) (bocongan.gov.vn)
Bộ Công an / Công an tỉnh Quảng Ninh - subscriber verification only via VNeID, operator app or store (Circular 08/2026/TT-BKHCN) (bocongan.gov.vn)