Adding or removing a number from the Do Not Contact List
Go to Settings, then under Lead Source Settings click Do Not Contact List. Then click New to add a number or select a Phone number from the list and click Remove to remove it.
On the Do Not Contact List screen, you can view the Phone number, Times Hit, Date Added, and Last Hit. Use the funnel icon next to Last Hit to filter your view.
If you have an external do not contact list, click Import Items to import.