We found a telephone listing for our number when we typed our number
in the very first window that we come to in Google. The address of the
phone directory is www.google.com/images/phone_img2.gif.  How can we
access the database or company to make a change?

The link you posted just gets a picture of a phone...probably not
enough to identify the source of the info.

Can you copy and paste the full address of the page that shows your
info?  If the address includes any private info, just replace those
characters with X's for letters or 9's for numbers.  Maybe it will
give someone a clue.

This should be helpful:

://www.google.com/help/pbremoval.html