Vietnam: SMS delivery facts
SMS delivery to Vietnam (+84) requires attention to sender ID rules and character encoding. Alphanumeric brandname sender IDs need pre-registration with local telecom operators. Native Vietnamese text uses UCS-2 due to tone marks outside GSM-7, with 70-character single segments or 67 when concatenated.
| Country calling code | +84 (ITU-T E.164 assigned country codes, retrieved 2026-07-27) |
|---|---|
| E.164 format | +84 followed by the national subscriber number, no leading trunk zero, 15 digits maximum overall (ITU-T E.164) |
| Alphanumeric sender ID | pre registration (per Vietnam telecom operator brandname registration requirement, retrieved 2026-07-26) |
| Registration regime | carrier-specific practice |
| Dominant language(s) | Vietnamese |
| Native-text charset | UCS-2 — 70 characters per single SMS, 67 per concatenated segment (GSM 03.38 default alphabet vs script analysis, retrieved 2026-07-27) |
| Published SMSRoute rate | USD 0.01 per message, dated snapshot (source, retrieved 2026-07-27). Current rate and send path: rate card for Vietnam |
Sender-ID rules
Alphanumeric 'brandname' sender IDs require pre-registration with local telecom operators, typically backed by a business license. (per Vietnam telecom operator brandname registration requirement, verified 2026-07-26)
Alphanumeric 'brandname' sender IDs require pre-registration with local telecom operators, typically backed by a business license, under a regime that is carrier-specific rather than a formal public scheme. Vietnamese tone marks (ạ ế ữ …) lie outside GSM-7, so native text sends as UCS-2. This yields 70-character single segments and 67-character concatenated segments.
Character set and message length
Native Vietnamese text is classed as UCS-2 here: 70 characters fit a single SMS and 67 per segment once a message is concatenated.
Vietnamese tone marks (ạ ế ữ …) are outside GSM-7 — native text sends as UCS-2.
To count segments for a concrete message, use the UDH segment surgeon; to compare all 40 countries side by side, the country requirements explorer reads the same open dataset (CC-BY 4.0).
Every figure above is maintained by SMSRoute guides with a named source and retrieval date - the machine-readable copy for Vietnam lives in api/v2/countries.json (CC-BY), field-level provenance included.
Frequently asked
- Do alphanumeric sender IDs work for SMS to Vietnam?
- Alphanumeric brandname sender IDs require pre-registration with local telecom operators, typically backed by a business license.
- What charset and segment lengths apply to Vietnam SMS?
- Vietnamese tone marks sit outside GSM-7, so native text sends as UCS-2 with 70-character single segments or 67 when concatenated.
- What is the calling code and published SMS rate for Vietnam?
- The calling code is +84. The published rate is 0.01 USD (retrieved 2026-07-27).
- How do I test SMS delivery to Vietnam without a local SIM?
- Use a delivery-testing service that sends to real local Vietnamese numbers. SMSRoute accounts include free test credits so you can confirm handset delivery without owning a Vietnam SIM.
- Can I use my company name as the sender for SMS to Vietnam?
- Yes—as an alphanumeric 'brandname' sender ID—but it requires pre-registration with local telecom operators, typically backed by a business license.
Related
- DLR status codes behind Vietnam delivery reports
- Metrics to check before trusting a Vietnam route
- Australia: SMS delivery facts
- Austria: SMS delivery facts
- Belgium: SMS delivery facts
- Sender ID (glossary)
- GSM-7 (glossary) · UCS-2 (glossary)
- All 40 country fact sheets
Facts on this page are dated snapshots with named sources; rates change — the linked rate card is authoritative. Corrections: ops@smsroute.cc. Last verified 2026-07-27.