South Korea Voice Features and Restrictions

International reach:

• Calls from International numbers are supported.

Domestic reach:

• Domestic Vonage numbers must only be used to place calls via Vonage Voice API.
• Domestic calls from non-Vonage numbers are not supported.
• The self-service buying of numbers is not available for South Korea at this time on Vonage's Customer Dashboard. Customers can still request a new number from Customer Dashboard by filling in and submitting the required information or by contacting their Account Manager to start the order. After the request is reviewed and there is no issue, the new number will be reserved for customer.
• Outbound calls from Toll Free numbers are not supported.

You cannot add a plus sign (+) to CLI.

When calling from overseas to a South Korea non-Vonage number, the call recipient should see the international telephony carrier’s prefix and caller number as the CLI. For example, if US number 14155551212 is calling to the South Korea number, the CLI will show up as 006 14155551212.

Prefixes for different carriers:

• KT 001
• LGU 002
• SK Telink 006

When calling from overseas to a South Korea Vonage number, the call recipient should see a prefix 820, the international telephony carrier's prefix (but without the 00) and caller number as the CLI. For example, if US number 14155551212 is calling to the South Korea number, CLI will display as 820 6 14155551212.

Local calling: Do not include country code and also do not add a "0" in front. For example, if the Vonage number is 8212345678, then the dialling method should be 12345678.

International calling: Normal dialling as how you would call a number that belongs to a different country. For example, if the Vonage number is 8212345678, then the dialling method should be +8212345678.

No limitations beyond those in our Acceptable Use Policy.