---
title: "Sender ID registration in Vietnam"
description: "Register an SMS sender ID in Vietnam: AIS rules, 7–14 business days lead time, sending hours, opt-out wording, alphanumeric formats and rejection reasons."
canonical: "https://omnichannels.ai/sender-id/vietnam/"
language: "en"
updated: "2026-10-01"
publisher: "BroadNet Technologies"
brand: "OmniChannels.ai"
---

# Sender ID registration in Vietnam

Canonical: https://omnichannels.ai/sender-id/vietnam/
Language: en
Publisher: OmniChannels.ai by BroadNet Technologies

**Short answer:** Yes. Sender ID registration is required in Vietnam (national brand-name system (Authority of Information Security, Decree 91/2020/ND-CP)). Approval typically takes 7–14 business days. Alphanumeric IDs of up to 11 characters are accepted. OmniChannels.ai handles the filing across 3 operators and confirms current rules during onboarding.

## Sender ID rules at a glance

| Item | Details |
|---|---|
| Regulator | Authority of Information Security (AIS) |
| Registration required | Required (National brand-name system (Authority of Information Security, Decree 91/2020/ND-CP)) |
| Typical lead time | 7–14 business days |
| Alphanumeric sender ID | Yes (Latin letters, up to 11 characters) |
| Numeric long code / short code | Not listed for this market; alphanumeric is the documented format |
| Accepted formats | Up to 11 characters: Latin letters, digits, - _ . and space; not digits only |
| Promotional sending hours | 07:00–22:00 local time (Decree 91/2020/ND-CP allows advertising messages only between 07:00 and 22:00 each day. Transactional 24/7.) |
| Opt-in | Verifiable opt-in required, with traffic categorised by use case at the time of registration. DLT-style template approval applies in several markets. |
| Opt-out | STOP keyword and DND-registry suppression applied automatically. Records retained per regulator requirements. |
| Operators we reach | Viettel, Vinaphone and Mobifone |
| Last reviewed | 1 October 2026 (Sources: AIS, Decree 91/2020) |

Official sources: [AIS](https://ais.gov.vn/), [Decree 91/2020](https://congbaocdn.chinhphu.vn/CongBaoCP/VanBan/2020/8/31908/32282-1-2020837-83891-2020-nd-cp.pdf)

## How to register your sender ID in Vietnam through OmniChannels.ai

1. **Choose and check your sender ID:** Pick a sender ID that matches your brand: Latin letters, up to 11 characters. Test it in the free sender ID checker first.
2. **Send us your company details and use case:** Tell us the legal entity, brand and what each sender ID will send (OTP, transactional or promotional). We confirm which supporting documents are currently needed.
3. **We file your registration:** We prepare and submit the application. Current process in Vietnam: National brand-name system (Authority of Information Security, Decree 91/2020/ND-CP).
4. **Approval and test messages:** Approval typically takes 7–14 business days. Once approved we send test messages on Viettel, Vinaphone and Mobifone and check the sender ID displays correctly.
5. **Go live:** Send through the REST API, SMPP or campaigns. Promotional messages go out 07:00–22:00 local time. Opt-out handling is applied to every promotional message.

## Common reasons a sender ID is rejected in Vietnam

- Too long: sender IDs here are up to 11 characters.
- Generic words instead of a brand, such as INFO, SMS, OTP, ALERT: regulators usually refuse them.
- Arabic, accented or other non-Latin letters: this market lists Latin letters only.
- A digits-only sender that is not a real phone number you own.

## Sender ID in Vietnam: questions

### Do I need to register a sender ID in Vietnam?

Yes. National brand-name system (Authority of Information Security, Decree 91/2020/ND-CP). We submit it for you and confirm the current requirements during onboarding.

### How long does sender ID registration take in Vietnam?

Typically 7–14 business days, depending on the operator and the documents provided. We confirm the current timeline for your sender ID during onboarding.

### Can I use an alphanumeric sender ID in Vietnam?

Yes. Alphanumeric sender IDs are accepted: Latin letters, up to 11 characters. Accepted formats: Up to 11 characters: Latin letters, digits, - _ . and space; not digits only.

### When can I send promotional SMS in Vietnam?

Promotional window: 07:00–22:00 local time. Decree 91/2020/ND-CP allows advertising messages only between 07:00 and 22:00 each day. Transactional 24/7.

### What consent and opt-out rules apply in Vietnam?

Verifiable opt-in required, with traffic categorised by use case at the time of registration. DLT-style template approval applies in several markets. STOP keyword and DND-registry suppression applied automatically. Records retained per regulator requirements.

### Who regulates SMS sender IDs in Vietnam?

Authority of Information Security (AIS), together with the mobile operators (Viettel, Vinaphone and Mobifone). Official sources: AIS, Decree 91/2020.

## Related

- [Sender ID checker for Vietnam](https://omnichannels.ai/tools/sender-id-checker/?country=VN)
- [SMS pricing in Vietnam](https://omnichannels.ai/sms-pricing/vietnam/)
- [Register your sender ID](https://omnichannels.ai/contact/)

Last reviewed 2026-10-01. Rules are confirmed during onboarding.