If you have the necessary permissions you can add descriptions to your outbound calling records. If you click on the phone numbers tab and don't see the add, import, edit, and remove buttons, you don't have the necessary permissions. This makes reports easier to read and eliminates the hassle of having to look up or remember the numbers on your bill.
You can add up to two descriptions per phone number. These descriptions can be used together or independent of each other when selecting the group and subgroups of your reports. Phone number descriptions are visible to all users in your organization.