---
title: "Singapore (+65) Country Calling Code & SMS Numbering Plan"
---

Singapore (+65) Country Calling Code & SMS Numbering Plan: SMSRiver

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- Singapore (+65)

National Telecom Specification

# Singapore (+65) Country Calling Code & SMS Guide

Complete engineering reference for phone numbering formats, domestic trunk prefixes, cellular mobile operator allocations, and regulatory A2P SMS requirements in Singapore.

Quick Jump:
[Numbering Plan](#numbering-plan)
[A2P Regulations](#sms-regulations)
[Verify SG Number](#inspector-cta)

Country Dialing Code
+65
ISO: SG

Domestic Trunk Prefix
None
Omitted internationally

National Length
8 digits
Local subscriber digits

Full E.164 Length
10 digits (+65 8xxx xxxx / +65 9xxx xxxx)
With +65 prefix

## Telephony Architecture & Carrier Allocations

Destination Codes:
Fixed-line 6xxx, Mobile 8xxx/9xxx

Mobile Prefix Patterns:
8xxx and 9xxx exclusively allocated for cellular mobile telephony by IMDA

Major Mobile Network Operators:
Singtel, StarHub, M1, SIMBA Telecom

## A2P Messaging Regulations & Firewall Policies

A2P 10DLC & Campaign Registration
Not applicable. Supervised by Infocomm Media Development Authority (IMDA).

Alphanumeric Sender ID Support
Mandatory registration under the Singapore SMS Sender ID Registry (SSIR). Unregistered alphanumeric sender IDs are tagged '[Likely Scam]' or blocked by carriers.

Two-Way Messaging Capability
Supported using Singapore 8xxx/9xxx virtual mobile numbers.

Character Encoding Standards
GSM-7 standard (160 chars/segment).

Compliance Framework: IMDA SSIR framework, Spam Control Act, and Personal Data Protection Act (PDPA).

Interactive Number Intelligence

### Test a Singapore Number Now

Check if a Singapore phone number conforms to the national numbering plan, classify mobile vs VoIP allocation, and obtain canonical E.164 standardization.

Inspect Number →

## Frequently Asked Questions for Singapore

### What is the international calling code for Singapore?

Singapore's country calling code is +65. Domestic numbers are 8 digits long without a trunk prefix.

### What is Singapore's SMS Sender ID Registry (SSIR)?

IMDA mandates that all organizations sending SMS with alphanumeric sender IDs must register with the SSIR. Unregistered sender IDs are blocked or marked as '[Likely Scam]' by Singaporean carriers.

### Related National Calling Codes

[Australia
+61](/country-codes/australia/)

[Austria
+43](/country-codes/austria/)

[Belgium
+32](/country-codes/belgium/)

[Brazil
+55](/country-codes/brazil/)

[Canada
+1](/country-codes/canada/)

[France
+33](/country-codes/france/)

[Germany
+49](/country-codes/germany/)

[India
+91](/country-codes/india/)

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