Singapore Postal Code Format Guide
Singapore postal codes contain six digits and identify delivery sectors and points. Leading zeroes are valid and must be preserved.
Standard format
NNNNNN
Example
018956
Implementation and validation notes
Singapore postal codes contain six digits and identify delivery sectors and points. Leading zeroes are valid and must be preserved.
Validate required state, character set, length, and syntax on the client, then repeat validation on the server. Preserve the original input and normalize into a separate field; never truncate local scripts, compound names, or leading zeroes to fit a single Western assumption.
This guide describes common formats rather than an official registry and cannot enumerate every exception. Generated output is for testing only, not delivery, calling, identity verification, or real account activity.
Related resources
Frequently asked questions
What is the standard Singapore postal code format?
A common representation is NNNNNN, for example 018956. Singapore postal codes contain six digits and identify delivery sectors and points. Leading zeroes are valid and must be preserved.
How should Singapore postal code test data be stored?
Store the original value as a string so leading zeroes, spaces, hyphens, accents, and local scripts are preserved. Use a separate normalized field for search.
Does correct formatting prove the data is real?
No. Syntax validation cannot prove an address is deliverable, a number is assigned, or a name belongs to a real person.