Question 1

What is an Indonesian NIK?

Accepted Answer

NIK (Nomor Induk Kependudukan) is the 16-digit national identity number printed on every Indonesian ID card (KTP). Its digits encode the province, city/regency, district, birth date, gender and a unique sequence.

Question 2

Does this API look up personal data?

Accepted Answer

No. Parsing is purely structural: the API decodes what the digits themselves encode and maps the region codes to province, city and district names from our own reference data. It never queries any government or third-party database and stores nothing you send.

Question 3

Why can the region names be null?

Accepted Answer

Region codes have been renumbered over the decades. A NIK issued under an older code still parses, but the current name lookup may miss - the codes are always returned, the names are best effort.

Indonesian NIK Parser

Frequently Asked Questions