--- title: "Do Not Call Registry" slug: "do-not-call-registry" description: "Align your outbound calling with “do not call” preferences by uploading a Do Not Call list to your contact center." tags: ["block", "blocking calls", "blocklist", "call blocking", "Compliance", "DNCR", "Do Not Call", "Do Not Call Registry"] updated: 2026-01-29T12:54:48Z published: 2026-01-29T12:54:48Z canonical: "docs.voiso.com/do-not-call-registry" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.voiso.com/llms.txt > Use this file to discover all available pages before exploring further. # Do Not Call Registry **Who should read this article**: Administrators, Supervisors Align your outbound calling with “do not call” preferences by uploading a Do Not Call list to your contact center. ## Introduction Use the Do Not Call Registry (DNCR) to prevent outbound calls to contacts who have opted out of receiving calls from your organization. In many countries, regulators, telecom providers, or industry bodies maintain a national “do not call” list or registry. Contact centers are expected or required to check their calling lists against these registries and avoid calling numbers that are marked as “do not call.” The **Do Not Call Registry** page enables you to upload **DNCR** (do-not-call) lists and automatically blocks outbound calls to numbers on the list. Note - Contact your Voiso representative or global admin to enable this feature. - The **Do Not Call Registry** page enables you to enforce your outbound calling policy, but your contact center remains responsible for DNCR compliance and for keeping DNCR data accurate and up to date according to local regulations in each territory where you operate. - Voiso does not connect directly to external DNCR services. You must upload your do-not-call list as a CSV file. - Every new file upload adds numbers to the existing DNCR list. Uploads do not overwrite previously added numbers unless you clear the list. ### Access and permissions In contact centers that do not use security access groups, users with the **admin** [role](/v1/docs/basic-user-roles) assigned have access to the **Do Not Call Registry** page. In contact centers that use [security access groups](/v1/docs/administration-security-access-groups), the **Access to Do Not Call Registry** can be assigned to an access group. Users assigned to the access group may access the **Do Not Call Registry** page. ## Enabling the Do Not Call Registry feature To enable the **Do Not Call Registry** feature, navigate to **Administration > System Settings**, then click the **Features** tab. In the **Do Not Call Registry** section, **Enable Do Not Call Registry**, optionally select a service provider (if available), then click **Save**. ### Providers If your contact center is configured to use a DNCR service, you can select one of the following services from the **Providers** menu: - Etisalat - Zen ## Preparing a DNCR CSV file To use the **Do Not Call Registry** feature you must first create a do-not-call list as a CSV file. Obtain the list from your DNCR provider, then add the list to your CSV file with the *optional* heading `Number` in the first row and a single number in each subsequent row, similar to this sample: ``` Number 447700900001 447700900002 34600123457 491601234568 393201234568 33612345679 ``` Tip You can download a CSV template file from the **Do Not Call Registry** page. Click **Import CSV**, then on the **Import CSV** panel, click **Download CSV template**. ## Do Not Call Registry page To access the **Do Not Call Registry** page, navigate to **Outbound > Do Not Call Registry**. The first time you use this page it is blank. To add your do-not-call list CSV file, click **Import CSV** to open the **Import CSV** panel. ![Do Not Call Registry Blank](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Blank.png) ### Import CSV panel Use the **Import CSV** panel to upload a [CSV file](/v1/docs/do-not-call-registry#preparing-a-dncr-csv-file) containing the phone numbers in E.164 format of your do-not-call list. Drag the CSV file onto the panel or click **Browse** to navigate to the file on your computer. ![Do Not Call Registry Import CSV Panel Blank](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Import%20CSV%20Panel%20Blank.png) Before the numbers are imported, they are validated using the same rules as the [Number validator](/v1/docs/outbound-number-validator) feature. Numbers with invalid formats are *not* added to the DNCR list. Click **Import** to upload and validate your do-not-call list. ![Do Not Call Registry Import CSV Panel Uploaded](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Import%20CSV%20Panel%20Uploaded.png) After uploading, the **Import CSV** panel displays information about the CSV: 1. The file you uploaded. Click **X** to remove the file without importing the numbers. 2. The number of valid phone numbers. 3. The number of duplicate and invalid numbers in the file. 4. A link to download the list of invalid and duplicate phone numbers. When you are ready, click **Import** to add the numbers to the Do Not Call Registry. ![Do Not Call Registry Filled](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Filled.png) The **Import CSV** panel closes and the **Do Not Call Registry** page displays a count of the phone numbers in the DNCR. ## Exporting the DNCR To export a CSV file containing a list of the numbers in the Do Not Call Registry, click **Export CSV**. ## Deleting the DNCR To remove all phone numbers from the Do Not Call Registry, click **Delete**. ## Updating the DNCR Each time you import a new CSV file of phone numbers to the Do Not Call Registry, the numbers are added to the existing list. To remove individual numbers from the list, follow these steps: 1. Click **Export CSV** to download a copy of the Do Not Call Registry. 2. Click **Delete** to clear the Do Not Call Registry. 3. Modify the exported CSV as required. 4. Click **Import CSV** and follow [these steps](/v1/docs/do-not-call-registry#import-csv-panel) to upload, validate, and import the modified do-not-call list. ## How the DNCR list is applied When the Do Not Call Registry feature is enabled in your contact center, every outbound call attempt, including manually dialed, click-to-call, and Dialer campaign calls, is checked against the list. - If the dialed number is on the DNCR list: - The call is blocked before it is placed. - The agent sees a message explaining that the number cannot be dialed because it is on the Do Not Call Registry. - If the number is not on the DNCR list: - The call continues as usual, subject to any other outbound policies or restrictions. ## Extended Call Detail Records Attempted calls to numbers that are on the DNCR are recorded in the [Extended Call Details](/v1/docs/extended-call-details-voice) for the interaction. The **System reject** [end reason](/v1/docs/end-reasons) and [disposition](/v1/docs/disposition-codes) are recorded. ## Agent experience When an agent attempts to call a number, by manually dialing the call or using click-to-call, that is on the DNCR list: - The call does not start. - **Agent Panel** displays a message indicating that the number is blocked by the Do Not Call Registry. ![Do Not Call Registry Agent Panel Message](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Agent%20Panel%20Message.png) ## API integration with the Etisalat Safecall service For contact centers operating in the UAE, Voiso supports an API integration with the Etisalat Safecall service to verify outbound UAE numbers against the Do Not Call Registry in real time. Note This integration applies only to UAE numbers (+971). All outbound call types are supported, including agent dialed calls, click-to-call calls, and Dialer campaigns. ### Connecting to the Etisalat Safecall service #### Prerequisites - An Etisalat developer account. - A **DNCR check** app in your Etisalat **My App** section. - From your DNCR check app: - Consumer Key - Consumer Secret #### Connecting to your Etisalat app To access the **Do Not Call Registry** page, navigate to **Outbound > Do Not Call Registry**. To connect to your app in your Etisalat account, complete the following fields, then click **Connect**. - **Client ID** — Enter your Etisalat Consumer Key - **Client secret** — Enter your Etisalat Consumer Secret ![Do Not Call Registry Blank API Method](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Blank%20API%20Method.png) ### How the Etisalat Safecall service DNCR list is applied Voiso automatically performs a verification check immediately before each outbound call is placed. If the Etisalat Safecall service indicates the number is restricted, Voiso blocks the call and [records the outcome](/v1/docs/extended-call-details-voice) and [End reason](/v1/docs/end-reasons) in call records for audit and reporting. If the API is unavailable or verification cannot be completed, Voiso blocks the call by default and notifies administrators so the issue can be addressed quickly. ### Disconnecting from the Etisalat Safecall service To disconnect from the Etisalat Safecall server, navigate to **Outbound > Do Not Call Registry**. Click **Disconnect**. Important After disconnecting, numbers will no longer be checked against the registry and outbound calls will not be blocked. ## API integration with the ZEN service For contact centers operating in the UAE, Voiso supports an API integration with the Zen service to verify outbound UAE numbers against the Do Not Call Registry in real time. Note This integration applies only to UAE numbers (+971). All outbound call types are supported, including agent dialed calls, click-to-call calls, and Dialer campaigns. ### Connecting to the Zen service #### Prerequisites - A Zen developer account. - Zen account information: - API Key - Account ID - Parent ID #### Connecting to your Zen account To access the **Do Not Call Registry** page, navigate to **Outbound > Do Not Call Registry**. To connect to your Zen account, complete the following fields, then click **Connect**. - **API key** — Enter your Zen API Key - **Account ID** — Enter your Zen Account ID - **Parent ID** — Enter your Zen Parent ID ![Do Not Call Registry Blank API Method Zen.png](https://cdn.document360.io/44ae307a-3737-4fbf-98e0-9b888deb90dc/Images/Documentation/Do%20Not%20Call%20Registry%20Blank%20API%20Method%20Zen.png.png) Comma-Separated Values. A data file format where the content is structured in tabular form. Fields (data values) are separated by commas. Rows (records) are separated by line feeds. Voiso supports UTF-8 format for CSV files. CSV files allow interchange of data between spreadsheet applications, text files, and database. It is a common format for importing and exporting data. Each row represents a record. Each value represents an attribute. An international standard that specifies the format for phone numbers. In E.164 format, a phone number consists of a country code, a national destination code, and a subscriber number. The E.164 format eliminates additional characters or symbols like parentheses, dashes, or spaces, providing a globally recognized structure for telephone numbers. Refer to https://www.itu.int/rec/T-REC-E.164 ## Related - [System settings](/administration-system-settings.md) - [Agent Panel](/agent-panel.md) - [Extended Call Details: Voice](/extended-call-details-voice.md)