Register call block number

Available in Classic and VPC

Request

This section describes the request format. The method and URI are as follows:

Method	URI
POST	/sms/v2/services/{serviceId}/unsubscribes

Request headers

For information about the headers common to all Simple & Easy Notification Service APIs, see Simple & Easy Notification Service request headers.

Request path parameters

You can use the following path parameters with your request:

Field	Type	Required	Description
`serviceId`	String	Required	SMS service ID See Get project list.

Request body

You can include the following data in the body of your request:

Field	Type	Required	Description
`clientTelNo`	String	Required	Opt-out phone number Up to 1000 can be entered.

Request example

The request example is as follows:

curl --location --request POST 'https://sens.apigw.ntruss.com/sms/v2/services/ncp:sms:kr:50*********1:sens/unsubscribes' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}' \
--header 'Content-Type: application/json' \
--data '[
  {
    "clientTelNo": "010********"
  },
  {
    "clientTelNo": "010********"
  }
]'

Response

This section describes the response format.

Response body

The response body includes the following data:

Field	Type	Required	Description
`clientTelNo`	String	Required	Opt-out phone number
`registerTime`	String	Required	Opt-out registration date and time YYYY-MM-DDTHH:mm:ss.sss format
`registerType`	String	Required	Opt-out inflow path `C` \| `M` `C`: ARS `M`: Manual

Response status codes

For information about the HTTP status codes common to all Simple & Easy Notification Service APIs, see Simple & Easy Notification Service response status codes.

Response example

The response example is as follows:

[
    {
        "clientTelNo": "010********",
        "registerType": "M",
        "registerTime": "2025-11-26T10:11:59.271"
    },
    {
        "clientTelNo": "010********",
        "registerType": "M",
        "registerTime": "2025-11-18T10:51:36.957"
    }
]