SNILS Validator (Russia Social Security ID)
Validate authenticity, structure, and Modulo 101 checksum of Russian SNILS numbers.
About Russian SNILS Validation
This tool inspects the 11-digit SNILS string, ensuring proper format and verifying that the final 2-digit checksum conforms to official SFR Modulo 101 rules.
Fast, real-time client-side validation executed in memory with complete privacy.
SNILS Validation Algorithm
- Strip dashes and spaces, verifying input contains exactly 11 digits.
- Check legacy exception for account numbers <= 001001998.
- Calculate descending weighted sum and apply Modulo 101 rules.
- Compare with final 2 check digits.