Domestic vs International
Requirements differ by who is sending. Pick the scope that matches your business.
Registration is not required for South Korea — traffic can be sent directly through wholesale routing.
Sender capabilities
Registration requirements
Restrictions
Sending rules
Operator regulations
3 networks carry SMS traffic in South Korea. MNP is live in most markets — run an HLR lookup before routing.
Additional compliance notes
Country & operator-specific guidance maintained by the Sender ID team.
Requirements
Company name, Company website, Use case description,, Content Sample For marketing traffic, the SMS template must include the following opt-out information: 1. Insert (ê´‘ê³ ) at the beginning of the message. (ê´‘ê³ ) means advertisement. 2. Indicate the company name and add a contact number. If the contact number is the same as the Sender’s number, it can be omitted. 3. Users need to be opted in before sending. 4. Add 무ëEURŒê±°ë¶€/무ëEURŒìˆ˜ì‹ 거부 - a free 10 digit opt-out number (080-XXX-XXXX) the end clients can use to opt out with a call. Example: 무ëEURŒê±°ë¶€ 080-XXX-XXXX or 무ëEURŒìˆ˜ì‹ 거부 080-XXX-XXXX The 080 number needs to be purchased.
Required documents
N/A
Need help registering your Sender ID?
Our compliance specialists assist with registration requirements, document review, operator approvals, and both domestic and international onboarding.