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 A2P Regulations Verify SG Number

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.

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 Austria +43 Belgium +32 Brazil +55 Canada +1 France +33 Germany +49 India +91