DeterminedAI
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VAT / GST / ABN Number Validator
Check one number or upload a CSV with up to 100. We hit the authoritative registries — EU VIES, UK HMRC, Norway Brønnøysund — and return the registered name and address when available.
Single
Batch (up to 100)
CSV upload
Accepts formatted or unformatted IDs. Country prefix is optional.
Paste one ID per line: country,tax_id or tax_id with country prefix
0 rows
Validate batch
Results
Country
Tax ID
Status
Source
Business name
Address
Download results as CSV
Registry coverage
Live registry lookup (returns business name + address):
EU — VIES
All 27 member states · authoritative
United Kingdom — HMRC
VAT check service · authoritative
Norway — Brønnøysund
Enhetsregisteret · authoritative
Format-only validation (regex check, no registry hit):
Switzerland (CHE)
MWST / TVA / IVA format
Australia (ABN)
11-digit format
Singapore (GST)
UEN format
Canada (GST/HST)
BN + RT format
India (GSTIN)
15-char format
Need this at scale or inside your invoicing flow?
Sign up for a free DeterminedAI account to get an API key, unlimited validations, webhook callbacks, and VIES/HMRC results cached for 24 hours.
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See pricing