You can easily erase all or a section of content in your Address Book using the “Customize” screen. This feature is also useful for creating a blank Address Book that you can import new addresses into.
Erasing specific content from your Address Book
First, you will need to go to the “Customize” screen for the Address Book that you want to erase parts of. Once you are on that screen, click on the "Delete my address book or erase data" tab, and then on the blue "Erase specific data from this address book" link.
On the next screen, the “Erase Address Book” screen, you will have the option of clicking on checkboxes next to the contacts that you want to erase. After you have reviewed the addresses you want to erase, you can click on the "OK, Erase It” button to complete the process.
If there are only a handful of addresses that you want to erase, you can also use the "Delete” command at the top of your Address Book.