How it works
Paste the number
Enter any company, tax, or identity number into the relevant validator.
We check it
Format validators run instantly. Live lookups query official registries in seconds.
Get a clear answer
Valid, invalid, or not found — with details you can act on immediately.
Validation tools
15 tools, one answer.
Format checks are always free. Live lookups use your daily quota.
Is this VAT number real?
EU VAT Validator
Validate EU VAT registration numbers against the VIES database in real-time.
Is this bank number correct before I wire?
IBAN Validator
Verify IBAN structure and checksum before sending international transfers.
Is this SWIFT code legit?
BIC / SWIFT Validator
Check BIC/SWIFT codes for correct format and known bank registry.
Is this a real registered UK business?
UK Company Checker
Look up Companies House to verify UK business registration status.
Is this Dutch citizen number valid?
BSN Validator
Validate Dutch Burger Service Numbers using the 11-proof algorithm.
Is this card number structurally valid?
Credit Card Validator
Run Luhn algorithm checks to verify card number integrity without charging.
Is this Dutch company registered?
NL KVK Checker
Verify Dutch Chamber of Commerce (KVK) registration numbers live.
Verify this financial entity identifier
LEI Lookup
Check Legal Entity Identifiers used in global financial transactions.
Is this customs number valid?
EORI Validator
Validate Economic Operators Registration and Identification numbers for customs.
When does this site's SSL expire?
SSL Certificate Checker
Inspect SSL certificate validity, expiry date, and chain trust for any domain.
Is this book number real?
ISBN Validator
Validate ISBN-10 and ISBN-13 numbers using standard check-digit algorithms.
Is this phone serial number legit?
IMEI Validator
Verify IMEI numbers with Luhn validation and check device registration.
Is this Spanish tax number valid?
NIF / NIE Validator
Validate Spanish national identity and foreigner identification numbers.
Is this Brazilian tax ID valid?
CPF Validator
Check Brazilian Cadastro de Pessoas Físicas numbers with digit verification.
Is this Australian business number real?
ABN Checker
Verify Australian Business Numbers against the ABR public register.