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Short Message Service:[Announcement] Sender ID registration regulations issued by IMDA in Singapore

Last Updated:Apr 06, 2023

This topic describes the announcement on the sender ID registration regulations issued by the Infocomm Media Development Authority (IMDA) in Singapore.

IMDA has announced that it will implement the SMS Sender ID Registry (SSIR) registration from January 31, 2023. SSIR registration is a full registration regime.

Take note of the following information:

  • Businesses and organizations that use alphanumeric sender IDs must complete SSIR registration at the earliest opportunity.

  • Only registered sender IDs can reach Singapore users, effective from January 31, 2023. All non-registered sender IDs will be replaced with a sender ID named “Likely-SCAM” for a transition period of six months. SMS messages sent with non-registered sender IDs will be blocked after the transition period.

  • Businesses and organizations must register with the SSIR by using their Unique Entity Number (UEN). Foreign companies can obtain a Singapore UEN by registering with the Accounting and Corporate Regulatory Authority (ACRA).

  • If your company sends SMS messages with an alphanumeric sender ID to Singapore customers, we recommend that you register your sender ID at the earliest opportunity to avoid any disruption to your SMS communication with your customers.

  • For more information about the SSIR registration, contact the Singapore Network Information Centre (SGNIC) at or visit its website at