German Tax ID (Steuer-IdNr) Validator
Validate the authenticity, format, and checksum of German Tax ID (Steuer-IdNr).
About German Tax ID (Steuer-IdNr) Validation
The German Tax ID (Steueridentifikationsnummer or Steuer-ID) is the unique, permanent 11-digit fiscal identifier assigned to every resident in Germany.
Consists of 11 numerical digits, where the first digit is non-zero and the 11th digit is a checksum computed according to ISO 7064 Modulo 11, 10 (DIN 5007-1).