Portugal NISS Generator
Portuguese Social Security Identification Number (NISS) of 11 digits.
Rate this tool
Your opinion is essential to help us maintain the quality of this project.
Be the first to rate!
About the Portugal NISS
The NISS is the unique 11-digit identification code issued by the Portuguese Social Security to manage social contributions, typically starting with prefix 1.
This tool generates and validates NISS codes, checking check digits using the official weighted Modulo 11 calculation.