German VAT ID (USt-IdNr) Validator
Validate the authenticity, format, and checksum of German VAT ID (USt-IdNr).
About German VAT ID (USt-IdNr) Validation
The German VAT Identification Number (USt-IdNr.) is the business tax identification number for companies conducting B2B transactions across the EU.
Composed of the prefix "DE" followed by 9 digits, where the final digit is verified using the ISO 7064 Modulo 11, 10 algorithm.