SMS in South Korea: Follow regulations for secure message delivery

Discover the regulations for sending SMS in South Korea


SMS in South Korea: Follow regulations for secure message delivery

Start messaging in South Korea, a country in East Asia. In South Korea, mobile connections account for 123.9 percent of the total population.SMS service can potentially reach out to more customers for transactional, verification, and promotional purposes.

The following regulations and best practices must be followed to have effective SMS communication in South Korea

Country Information

Country code - KR

Calling code - +82

Mobile number portability (MNP) - Yes

Mobile Country Codes (MCC) - 450

The four main mobile carriers in South Korea are KT Corporation, SK Telecom, and LG U+

Regulations and Best Practices For Sending SMS in South Korea

◆ Every SenderID will be marked with a long code containing the respective country code. Eg: A short code (/001/006/002/00777/009) is added in front of the Long Code.

◆ Generic sender IDs such as INFO, SMS, NOTICE, etc. are prohibited.

◆ Message content supports English and Korean characters only.

◆ Content [국제발신] will be appended for all international SMS.

◆ Concatenated messages (over 130 bytes) are not supported.

◆ GSM 7 messages were delivered but with the conversion of DCS to CP949 or Ascii 8bi.

◆ The maximum message length is 140 bytes (70 Unicode characters, 140 English characters).

◆ Send marketing messages only to users who have previously given their consent.

◆ Send transactional messages only to users with whom you have a business relationship or who have opted in to receive them.

◆ It is recommended to display the URL and toll-free number for opt-out, opt-out via the website, or replying to SMS free of charge.

◆ Political, religious, unsolicited, or gambling content is not allowed.

◆ The best strategy is to communicate only during the daytime unless it is urgent.

◆ Do not contact users on do-not-call or do-not-disturb registries.


● International and national SMS are charged at the same rates in this specific country.

● The charge for the service is per SMS submitted.

Visit Pricing for more details.

Contact D7 sales for free SenderID registration, and the estimated setup time is 3 working days


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