Every list has a visibility setting that controls who can see and use it. You can set visibility when you first save a list and change it at any time afterward.
The three visibility options
When you open the Save As dialog or the Edit List Name modal for a list, you will see a Visibility dropdown with three choices:
Everyone - All members of your organization can view and use the list.
Only me - Only you can see the list. Other users in your organization cannot see it in their list directory.
Specific people... - Only the users you select from a checkbox picker can view and use the list. You are always included and cannot remove yourself.
Set visibility when saving a new list
From the contacts page, apply the filters or search you want, then click Save As.
Give the list a name.
Choose List (static snapshot) or Saved search (dynamic, re-runs as contacts change).
Open the Visibility dropdown and select Only me.
Click Save.
Change visibility on an existing list
Go to your lists page.
Find the list and open its action menu (the three-dot icon on the row).
Click Edit Details.
In the Edit List Name modal, open the Visibility dropdown and select Only me.
Save the changes.
What "Only me" means in practice
When a list is set to Only me, other users in your organization cannot see it in the list directory or use it to start a calling session. You remain the only person who can view, use, or dial through the list. The visibility can be changed back to Everyone or Specific people... at any time by following the edit steps above.
Sharing with specific teammates instead
If you want to share the list with a small group rather than the whole organization, choose Specific people... instead of Only me. A user picker will appear. Check the names of the teammates you want to share with. Unchecking yourself is not allowed. Users not on the list will not be able to see it.