SINGAPORE SMS: Products and Compliance


Dialing code 65
Major Carriers SingTel, M1, StarHub, SIMBA
Number portability Yes
Message length 160 characters.
Support for Concatenated message Yes
Sender ID Supported Alpha, Alphanumeric, Long Code, Short Code 
Sender ID Registration Required 
Registration Time 2 Business Weeks (Both Short Code and Long Code)
Support for Two Way SMS Yes
Extra Information
  • Unicode is supported       

Prohibited Content:

The following types of messaging on all SMS messaging products are all prohibited:
- Advertising or promoting money-lending services


  • IMDA will be implementing the Full SMS Sender ID Registration starting from 31 January 2023. Under the Full SSIR Regime, organisations that wish to send SMS messages to Singapore mobile numbers must first register their alphanumeric Sender IDs. Only registered Sender IDs will reach Singapore users with effect from 31 January 2023. Find out more about the process by downloading our one-pager. -
  • With effect from 31 January 2023, all Sender IDs that is not registered with the SSIR, Sender ID will be overwritten to "Likely-SCAM"
  • With effect from 2 January 2014, Organisations must check with the Do Not Call (DNC) Registry to ensure that the Singapore telephone numbers that they are sending telemarketing messages to are not listed in the Registry -
  • Under the advertising rules, which took effect on 1 November 2011, licensed moneylenders are not permitted to advertise their services via SMS -


8x8 - IMDA To Implement Full SenderID Registration

SMS Sender ID Registry

Advisory Guidelines on the Do Not Call Provisions (PDPC)

Telecommunications Act (Chap 323)

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