If you pay extra for long distance, this tool from Act Blue can help you make phone calls for free. You enter your zip code and phone number and the system calls you back at your own phone and auto dials the long distance numbers for you.
Typically, the way these autocall systems work is that you input your information and the system calls you back within a few seconds. It then chooses the numbers for you to call and dials them automatically. You can’t see the number you are calling. The person answering the phone cannot see your phone number either–they see a local phone number, or one with an appropriate area code.