Czech Rodné číslo Generator
Birth and personal identification number of the Czech Republic (Act No. 133/2000 Coll.).
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About Czech Rodné číslo
Rodné číslo (RČ) is the national birth/personal identification number issued to all Czech citizens and foreign residents in the Czech Republic.
Regulated by Act No. 133/2000 Coll. and managed by the Ministry of the Interior (MVČR), it serves as the key identifier in healthcare, tax, and social security systems.
Anatomy & Structure of Czech Rodné číslo
Rodné číslo consists of 9 or 10 numeric digits in YYMMDD/SSSS format:
| Position | Field | Length | Meaning & Rule | Example |
|---|---|---|---|---|
| 1 to 2 | Birth Year | 2 digits | Last two digits of birth year (YY) | 96 |
| 3 to 4 | Month (+50 for Females) | 2 digits | Month (01-12 for males; 51-62 for females; +20/+70 for special cases) | 55 |
| 5 to 6 | Birth Day | 2 digits | Day of the birth month (01 to 31) | 23 |
| 7 to 9 | Distinction Sequence | 3 digits | Sequence number to distinguish persons born on the same day | 456 |
| 10 | Check Digit | 1 digit | Modulo 11 checksum (present for records issued after Jan 1, 1954) | 1 |
Official Rodné číslo Algorithm (Modulo 11)
Mathematical rule mandated by Czech legislation:
Full 10-digit number mod 11 = 0
- 1. The first 9 digits form the chronological and sequence base.
- 2. Compute remainder of the 9-digit number divided by 11.
- 3. If remainder is less than 10, the 10th digit is the remainder itself.
- 4. If remainder is 10, the 10th digit is 0 (and the 10-digit number is divisible by 11).
- 5. Gregorian calendar date validity is strictly enforced.