Home T.C. Kimlik No Turkey
Turkey T.C. Kimlik No validator
How the T.C. Kimlik No format works
- Format
- 11 digits, first digit 1-9
- Example
- 10000000146
Things to watch for
- 11 digits with two check digits (positions 10 and 11) derived from a weighted odd/even split of the earlier digits
- Checksum only — a number passing this test does not confirm it is currently assigned to a citizen
- The first digit can never be 0
^[1-9][0-9]{10}$The T.C. Kimlik No is Turkey’s 11-digit national identity number, assigned to every citizen by the Nüfus ve Vatandaşlık İşleri (General Directorate of Population and Citizenship Affairs) and printed on the national ID card (kimlik kartı). It’s asked for in nearly every official transaction in the country — opening a bank account, registering a mobile SIM, enrolling in school, or seeing a doctor.
The number’s first digit can never be 0, and the last two digits aren’t arbitrary — they’re calculated from the digits before them. The 10th digit comes from a weighted combination of the odd-position and even-position digits among the first nine, and the 11th is the sum of the first ten digits reduced modulo 10. Together, those two check digits make a single mistyped digit very likely to break the arithmetic.
How this validator works
This tool confirms the input is 11 digits starting with a non-zero digit, then recalculates both check digits from the digits entered — entirely in your browser, with nothing transmitted or stored.
What a pass doesn’t tell you
A number that passes both checks is internally consistent — it isn’t confirmation that the number belongs to a real, registered citizen. Only Turkey’s Nüfus ve Vatandaşlık İşleri can confirm a specific T.C. Kimlik No is genuinely assigned.
Scope: this page covers T.C. Kimlik No format and check-digit validation only — not identity or citizenship verification. Because it’s sensitive personal data tied to a real person, treat a pass as a typo-check, nothing more.
Content last reviewed 2026-07-23.
T.C. Kimlik No FAQ
What is a T.C. Kimlik No and who has one?
It's the 11-digit national identity number Turkey assigns to every citizen, printed on the kimlik kartı (ID card) and required for banking, mobile SIM registration, healthcare, and school enrollment.
How are the two check digits calculated?
The 10th digit comes from a weighted combination of the odd-position and even-position digits among the first nine; the 11th digit is the sum of the first ten digits reduced modulo 10. Both must match for the number to pass.
Does a valid check-digit result confirm the number belongs to a real person?
No. It only confirms the 11 digits are mathematically consistent — not that the number was ever assigned to anyone. Only Turkey's population registry, the Nüfus ve Vatandaşlık İşleri, can confirm that.