Singapore Phone Number Format Guide
Singapore numbers generally use eight digits and no domestic trunk prefix. Fixed lines often begin 6, mobiles 8 or 9, and +65 is added internationally.
Standard format
+65 NNNN NNNN
Example
+65 6123 4567
Implementation and validation notes
Singapore numbers generally use eight digits and no domestic trunk prefix. Fixed lines often begin 6, mobiles 8 or 9, and +65 is added internationally.
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 phone number format?
A common representation is +65 NNNN NNNN, for example +65 6123 4567. Singapore numbers generally use eight digits and no domestic trunk prefix. Fixed lines often begin 6, mobiles 8 or 9, and +65 is added internationally.
How should Singapore phone number 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.