Indonesia Kode Pos validator
How the kode pos format works
- Format
- 5 digits
- Example
- 10110
Things to watch for
- Format-only check — does not confirm the kode pos actually exists
- Always exactly 5 digits with no separators
- The first digit broadly identifies a group of provinces; Jakarta Pusat (Central Jakarta) addresses start with 10
^[0-9]{5}$An Indonesian kode pos is the 5-digit postcode Pos Indonesia uses to route mail — for example 10110 for an address in Jakarta Pusat (Central Jakarta). With over 17,000 islands and dozens of provinces to cover, the leading digit works as a broad regional grouping rather than a single province marker, and the remaining digits progressively narrow delivery down toward a sub-district. Anyone validating an Indonesian shipping address, a checkout form, or a spreadsheet of customer records needs the kode pos in the correct 5-digit shape before it’s trusted.
Because it’s a bare run of digits with no separator, a dropped or transposed digit produces a code that’s still superficially plausible, routing to an entirely different part of the archipelago without any obvious sign something’s wrong.
How this validator works
This tool checks that the input is exactly 5 digits with no letters, spaces, or hyphens, entirely in your browser, with nothing sent to a server.
What a pass doesn’t tell you
A kode pos carries no check digit, so matching the 5-digit shape is the most a client-side tool can confirm — not that Pos Indonesia has assigned it to a real sub-district. Confirming that requires Pos Indonesia’s own postcode lookup.
Scope: this page and tool cover format validation only — not address lookup or confirming a kode pos is currently in use.
kode pos FAQ
What is a kode pos and how many digits does it have?
Kode pos literally means 'postal code' — Indonesia's 5-digit code, written directly before or as part of the address, e.g. 10110 for a Jakarta Pusat (Central Jakarta) address.
What does the leading digit of an Indonesian kode pos mean?
The first digit broadly groups a cluster of provinces across the archipelago, with Jakarta and the surrounding region starting with 1; the remaining four digits progressively narrow delivery to a sub-district within that area.
Does a correctly formatted kode pos mean it actually exists?
No. This tool only confirms the string is 5 digits — it doesn't check it against Pos Indonesia's actual assignment list. Confirming a kode pos is real, and seeing which sub-district it names, requires Pos Indonesia's own postcode lookup.