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title: Singapore - Laws and Regulations 
description: SMS Global Knowledgebase
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# Singapore - Laws and Regulations 

## Laws and regulations for SMS in Singapore

**Mobile country code (MCC)**

- 525

**International dialling prefix**

- 65

**Major carriers**

- MOBILEONE
- Sing Tel
- StarHub

**SMSGlobal supported**

- Long Code- Yes
- Short Code- Yes
- Sender ID- Fully dynamic. No pre-registration is required.

**One-way communication**

- Yes

**Two-way communication**

- Yes, via long code or short code.

**Opt-in requirements**

- ON keyword must be used to opt-in.

**Opt-out requirements**

- STOP keyword must be included for customers to opt out of receiving messages.

**Message content**

Content related to the following is not permitted:

- Religion
- Adult themes
- Race
- Gambling
- Politics

**Message format supported**

- Unicode - Yes
- Concatenated messages - Yes

**Delivery receipts (DLR) supported**

- Yes

**Useful regulatory links**

- Infocomm Development Authority of Singapore - [www.ida.gov.sg](http://www.ida.gov.sg/)
- Personal Data Protection Act - [www.pdpc.gov.sg](http://www.pdpc.gov.sg/)
- Consumer's Association of Singapore - [www.case.org.sg](http://www.case.org.sg/)

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