Don is right about the auto dealers. Michael Gundran owns Advanced Credit Marketing which provide nationwide vanity toll free numbers to autodealers. Some of the numbers are 888-24approve, 888-24autoloan, 888-4easycredit.
He ports the numbers to a national phone room that provide operators 24hrs.

The dealers add the vanity # to their print and TV ads.

When people call in the operators ask questions and fill out a credit information sheet. They can tell which dealer the lead goes to by the zip code of the caller.

The credit info sheets are faxed to the auto dealers each morning so they have a stack of leads to followup on when the sales staff comes in.

The dealer pays a certain amount per lead.

Michael also has websites that correspond to the phone numbers such as 24aprove.com and 24autoloan.com.

They work the same way but the phone room is unnecessary so he makes a larger profit because he does not pay the phone room.

Thomas