---
title: "Get call block number"
slug: "sens-sms-unsubscribe-list"
updated: 2026-09-17T09:35:44Z
published: 2026-09-17T09:35:44Z
canonical: "api.ncloud-docs.com/sens-sms-unsubscribe-list"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://api.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get call block number

Available in Classic and VPC

Get a number opted out of receiving ad messages.

## Request

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

| Method | URI |
| --- | --- |
| GET | /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](/docs/en/sens-overview#%EC%9A%94%EC%B2%AD%ED%97%A4%EB%8D%94).

### 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](/docs/en/sens-project-list). |

### Request query parameters

You can use the following query parameters with your request:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `clientTelNo` | String | Optional | Opt-out phone number - Only numbers can be entered. |
| `pageSize` | Integer | Optional | Number of items per page - 1-100 |
| `pageIndex` | Integer | Optional | Page index - 0-N (default: 0) |
| `startTime` | Integer | Optional | Query start date and time (millisecond) - Unix timestamp format. - Based on opt-out registration date and time. - If not entered, the entire period will be applied as the default. |
| `endTime` | Integer | Optional | Query end date and time (millisecond) - Unix timestamp format. - Based on opt-out registration date and time. - If not entered, the entire period will be applied as the default. |

### Request example

The request example is as follows:

```
curl --location --request GET 'https://sens.apigw.ntruss.com/sms/v2/services/ncp:sms:kr:50*********1:sens/unsubscribes?startTime=1763721600000&endTime=1763808000000' \
--header 'x-ncp-apigw-timestamp: {Timestamp}' \
--header 'x-ncp-iam-access-key: {Access Key}' \
--header 'x-ncp-apigw-signature-v2: {API Gateway Signature}'
```

## Response

This section describes the response format.

### Response body

The response body includes the following data:

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `clientTelNo` | String | - | Opt-out phone number |
| `registerTime` | String | - | Opt-out registration date and time - YYYY-MM-DDTHH:mm:ss.sss format |
| `registerType` | String | - | 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](/docs/en/sens-overview#%EC%9D%91%EB%8B%B5%EC%83%81%ED%83%9C%EC%BD%94%EB%93%9C).

### Response example

The response example is as follows: If no opt-out numbers are registered within the query period, it returns an empty value with a `200 OK` status.

```
[
    {
        "clientTelNo": "010********",
        "registerType": "M",
        "registerTime": "2025-11-21T16:10:47.884"
    }
]
```