You may employ the services of a reverse phone lookup if you want to find out the identity of a phone owner, but did you know that you can also use this lookup to find an old friend's address or even update the addresses you have in your phone book? Thus, finding out someone's address can not only help you find out from where a person may be calling, but it can also provide you with a friend's new address, or inform you that they no longer live at the address you once knew.