A2P SMS regulations in Singapore.
Compliance with IMDA rules and sender-ID registration.
A2P SMS to Singapore is regulated by the Infocomm Media Development Authority (IMDA). Alphanumeric sender IDs must be registered in the SMS Sender ID Registry (SSIR), run by SGNIC; SGNIC puts the process at about 19 calendar days. PDPA (Singapore) fully enforced. BroadNet carries this traffic over direct operator connections.
Who regulates A2P SMS in Singapore?
Application-to-person messaging to Singapore is overseen by the Infocomm Media Development Authority (IMDA), which licenses the operators that terminate A2P traffic and sets the conditions those routes run under. BroadNet delivers into Singapore over direct operator connections — Singtel, StarHub and M1 — rather than through resold or grey routes, so the sender ID, the delivery receipt and the audit trail all come back from the licensed path.
- Telecoms regulator: Infocomm Media Development Authority (IMDA).
- Direct operator routes: Singtel, StarHub and M1.
- Sender-ID registration: SMS Sender ID Registry (SSIR), run by SGNIC, mandatory since 31 January 2023.
- Typical lead time: about 19 calendar days (SGNIC).
Sender ID registration in Singapore
Since 31 January 2023, every organisation that sends SMS with an alphanumeric sender ID to Singapore mobiles must register it in the SMS Sender ID Registry (SSIR), run by SGNIC, an IMDA subsidiary. The organisation registers itself — it needs a Singapore UEN and Corppass — and selects the Participating Aggregators allowed to carry its IDs. Unregistered IDs are delivered as "Likely-SCAM", and registered IDs sent through an aggregator that was not selected are blocked. SGNIC puts the whole process at about 19 calendar days, so register before you need the route, not during a launch.
- Registry: SSIR, run by SGNIC; mandatory since 31 January 2023.
- The organisation registers itself (Singapore UEN and Corppass needed).
- Select the Participating Aggregators that carry your traffic; BroadNet coordinates this during onboarding.
- Lead time: about 19 calendar days end to end (SGNIC).
Consent, content and timing rules
PDPA (Singapore) fully enforced. DNC (Do Not Call) registry honoured. SSIR registration mandatory — unregistered alphanumerics relabeled to 'Likely Scam'. Promotional traffic requires a consent record you can produce on request, and an opt-out that is honoured immediately and permanently. Transactional messages — one-time passcodes, delivery and account alerts — are treated differently from marketing, but the distinction is decided by the content of the message rather than by how the campaign is labelled.
- SSIR registration: mandatory for every alphanumeric sender ID; the organisation registers with SGNIC and selects its Participating Aggregators.
- PDPA: Singapore Personal Data Protection Act enforced. DNC honoured.
- 'Likely Scam' tag: Unregistered alphanumeric IDs relabeled at delivery — SSIR registration is non-optional.
- Promotional windows: DNC + opt-in honoured 24/7.
What this means for your integration
Practically, three things decide whether traffic to Singapore performs: a registered sender ID on an IMDA-licensed route, a consent and opt-out record you can evidence, and message content that matches the category it was registered under. BroadNet's compliance engine checks each submission against the Singapore ruleset before it reaches the operator, so a non-compliant send is rejected back to you rather than filtered silently downstream — which is the difference between a fixable error and traffic that quietly disappears.
- Every message returns a delivery receipt (DLR); BroadNet does not publish per-country delivery percentages.
- Indicative list pricing: USD 0.035 – 0.06 per message.
- Addressable mobile base: 9.5M subscribers.
- PDPA: Singapore Personal Data Protection Act enforced. DNC honoured.
- Submit your KYC packTrade licence, authorisation letter and sample messages
- BroadNet files the applicationWith the operators or the regulator, as the market requires
- Review and approvalTypical lead timeAbout 19 calendar days (SGNIC)
- Send under your brandYour approved sender ID on every message
Technical facts for Singapore
Network codes, message lengths and sender-ID rules in one table. Segment lengths are the GSM standard values (3GPP TS 23.038).
| Mobile country code (MCC) | 525 |
|---|---|
| Dialling code | +65 |
| Operators (MCC-MNC) |
|
| SMS length, GSM-7 (Latin alphabet) | 160 characters in a single SMS; 153 per part when concatenated |
| SMS length, UCS-2 (Arabic, Cyrillic and other scripts) | 70 characters in a single SMS; 67 per part when concatenated |
| Regulator | IMDA (Infocomm Media Development Authority) |
| Sender-ID rules | SMS Sender ID Registry (SSIR), run by SGNIC for IMDA, mandatory since 31 January 2023: the organisation registers its alphanumeric sender IDs itself and selects the Participating Aggregators allowed to carry them. English primary; Chinese / Malay / Tamil supported. |
| Sender-ID lead time | About 19 calendar days (SGNIC) |
More on Singapore
Compare A2P SMS rules across the region.
Each market pairs a regulatory playbook with its live coverage and operator-direct routing detail.
Singapore rules: promotional vs. transactional SMS
| Capability | Promotional / marketing | Transactional / service (OTP, alerts) |
|---|---|---|
| Registered sender ID required | ||
| Prior consent required | — | |
| Opt-out instruction required | — | |
| Timing restrictions apply | — | |
| Delivery receipts available |
Common questions
Who regulates SMS in Singapore?
Do I need to register a sender ID for Singapore?
How long does it take to start sending to Singapore?
What content and consent rules apply in Singapore?
What does A2P SMS cost in Singapore?
What delivery rate should I expect in Singapore?
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