International · Validation
Slovak rodné číslo validator.
Check a Slovak rodné číslo (birth number) against the rule in Slovak law and decode the date of birth and sex it carries.
How it works: for people born after 1 January 1954 the number has ten digits and the whole number must be divisible by 11 (Act 301/1995 Z. z., s.2(5)). Digits 1–6 are YYMMDD, with 50 added to the month for women.
Inputs
Result
Enter a number and press Check.
How a Slovak rodné číslo is built
The Slovak rodné číslo uses the same layout as the Czech one, a legacy of the shared Czechoslovak system: YYMMDD/SSS for people born up to 31 December 1953 and YYMMDD/SSSC from 1 January 1954.
Month field: s.2(3) says the second pair of digits is the month of birth, increased by 50 for women. This tool applies only that rule for Slovakia; the Czech additional series (+20 and +70) is not part of the Slovak act text, so those months are rejected here.
Check rule: s.2(5) states that the whole ten-digit number must be divisible by 11 without remainder. Nine-digit numbers (s.2(4)) have no such rule, so only the date can be checked.
Rule check only — not a registry lookup
A pass means the arithmetic and date are consistent. Whether a number was issued is known only to the Slovak Ministry of the Interior’s register.
Sources
- Act No. 301/1995 Z. z. on the birth number, s.2 (Slovak Republic) (retrieved October 2026)
Frequently asked questions
How do I validate a Slovak rodné číslo?
Strip the slash, check that digits 1–6 are a real birth date (month + 50 for women) and that a ten-digit number divides by 11 with no remainder (Act 301/1995 Z. z., s.2).
Is the Slovak rodné číslo the same as the Czech one?
The structure is the same, but each country applies its own law. Czech law also describes an additional series with month + 20 / + 70; the Slovak act text does not.
Why do older Slovak numbers have 9 digits?
People born up to 31 December 1953 received nine-digit numbers with a three-digit suffix and no divisibility rule.
Does a valid result mean the number was issued?
No. This tool never contacts any register.
Checksum only — not a registry lookup
This tool runs entirely in your browser. It does not query any government system and does not imply official verification. Nothing you type is transmitted, stored, or logged. Do not paste other people’s personal numbers you have no reason to hold.