The tax code lookup tool at mst.freeapps.vn lets you view basic public information about Vietnamese businesses using just a tax code (MST) or company name. Open and use — no signup, no ads, no limits.
What does this tool do?
When you need to quickly verify whether a Vietnamese business exists and is operational, the tool returns publicly available information:
- Full company name (Vietnamese + English if available)
- Registered business address
- Legal representative on record
- Business activities
- Current operational status
The tool is useful for quick verification before contacting a partner, or for cross-checking company names on contracts and invoices against official records.
How to use — 3 steps
Step 1: Open the tool
Visit mst.freeapps.vn from any device. No app to install, no account needed.
Step 2: Enter your search
Two input options:
- By MST: type the tax code directly. The tool accepts both 10-digit (e.g.
0319519960) and 13-digit branch codes (e.g.0123456789-001). - By company name: type the name — the tool suggests matching businesses to choose from.
Step 3: Review results
The result page shows all available public information. Use Copy to grab the MST quickly, or Share to send the link to a colleague.
When the tool is most useful
- Verifying a counterparty before initial contact
- Cross-checking MST on invoices against the registered MST
- Looking up business activities of a company
- Finding an MST when you only have the company name
When NOT to rely on the tool
The tool aggregates from public sources and may have a delay of hours to days. For any important decision (signing high-value contracts, litigation, official tax filings), please:
- Check directly at the General Department of Taxation or National Business Registration Portal
- Request the original Business Registration Certificate from the partner
- Consult a licensed lawyer or accountant when in doubt
Frequently asked questions
Is the tool really free with no hidden cost? Completely free. No paid tier, no usage limits.
Does the tool collect my data? No. No login required, no personal lookup history stored. freeapps.vn shows Google AdSense ads to keep the service free — see Legal page for details.
I entered the MST correctly but got no result. Why? The MST may be newly issued and not yet synced, or you may have missed the hyphen in a 13-digit MST. Try searching by company name instead.
Can the tool look up personal tax codes? No, only business MSTs. For personal MSTs, log in with your national ID at the General Department of Taxation portal.
Ready to look up?
Open mst.freeapps.vn — type an MST or company name, results in 1-2 seconds.
Disclaimer: This article is a usage guide for the lookup tool on freeapps.vn. Tool data is aggregated from public sources and does not replace official information from government authorities. freeapps.vn does not provide legal, accounting, or tax advice. For any legal, financial, or business decision, please consult a licensed professional. See full terms at Legal page.