Singapore Sender ID Requirements

Under Singapore’s Full SMS Sender ID Registry (SSIR) Regime, all organizations that send SMS messages to Singapore mobile numbers must register their sender IDs with the Singapore Network Information Centre (SGNIC), the national registry responsible for authorizing and regulating sender ID registration. Registration is required for alpha and alphanumeric sender IDs, dedicated short codes, and dedicated virtual long numbers. 

Post July 31, 2023, Singapore operators will pass through only messages with registered sender IDs. Messages from unregistered sender will be passed  as “possible spam” for the interim (pending SG-NIC update)

To comply with the requirements and avoid any disruption to their SMS communications, businesses must register their accounts and submit their preferred sender ID(s) via the SSIR portal and assign Participating Aggregators (PA). 

How to create an account

To register your sender IDs you must first create an account on the SSIR portal. 

Only organizations with a local unique entity number (UEN) as issued by relevant government agencies can register with the SSIR. If you don’t have a UEN but want to obtain one, follow these instructions

Foreign-based businesses can obtain a UEN by registering with the Accounting and Corporate Regulatory Authority (ACRA). Foreign-based businesses can register for sender IDs with SSIR via their local subsidiary or foreign branch office as long as the local subsidiary or foreign branch office can present a valid UEN. Non-business organizations (such as charities or religious bodies) can register with agencies that issue UENs to these types of organizations. 

Currently there doesn’t seem to be a way for businesses without a UEN to register on the SSIR portal. . Please let your customer success manager or our support team know if you’re unable to obtain a Singapore UEN. 

Once you have a UEN, register your account on the SSIR portal. SGNIC will notify you when your account has been approved. The process takes about two days.

How to register sender IDs

Once you have an account you can submit the sender ID(s) you’d like to send messages from. Review the rules for valid sender IDs, then enter your information in the SSIR Portal.

During registration you’ll be asked to choose one or more Participating Aggregators (PA). Choose these PAs to ensure Plivo can successfully terminate your Singapore messages.


The process of getting SSIR approval for sender ID registration takes about a week.

How to add PAs if you already have a registered sender ID

If you’ve already registered sender IDs and you need to add PAs, you must send an email message to SGNIC, cc-ing Plivo, asking them to add the aforementioned PAs to the the list of those authorized for your sender ID. Here’s an example email.



Our UEN is <your UEN>, and we have <these> sender IDs registered with you:
- SID1
- SID2


For these sender IDs, we’re partnering with these Participating Aggregators in addition to our current ones:

- Macro Kiosk Pte Ltd

- Mocean Pte Ltd

- Hello Technology Pte Ltd

- Green Packet Global Pte Ltd

We request that you update the SSIR portal accordingly and let us know once you’ve done so.


 Name, Title, Address


Create a Letter of Authorization

Once your registration is approved, create a Letter of Authorization (LOA) [template] and submit it to Plivo as an attachment to a support ticket. We need the LOA so we can inform the Singapore authorities that you’re allowing Plivo to send messages using your sender IDs. Once we receive your signed LOA, we will get your sender IDs whitelisted with Singapore operators. This process can take up to two days. Once it’s complete you can start sending messages to Singapore mobile subscribers.


SSIR bills organizations for setup fees and sender IDs; an invoice will be emailed to the organization’s designated billing contact.

Fee Amount Period
Setup fee (one-time) S$500 Chargeable on the first day of the calendar month immediately following the commencement date (billing start date)
Listing of sender IDs during a billing year S$200 per whitelisted sender ID

The first day of their billing year is the first day of the calendar month following the month of onboarding. For example, an organization that onboards on August 15, 2023, will have its first billing year from September 1, 2023, to August 31, 2024.

Subsequent annual fees will be charged on the first day of the next billing year until the termination of the user agreement.

The annual fee for a billing year will not be prorated even if a sender ID is listed for less than a full calendar year. Organizations that remove sender IDs will not be refunded for the remaining time in a billing year.

These fees are payable to SGNIC (Singapore Network Information Centre).

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