to view your Dreamweaver Site settings, go to Site -> Manage Sites.
From the lsit of sites, select your site and click the edit button.
if you are using DWCS4 and below, click the Advanced button at the top, then select the Local Info tab to see the HTPP Address setting.
Look on the Testing server tab to see the URL Prefix.
if you are using DWCS5, Look under the servers section to see the testing server settings.
and look under the advanced section to see the Local Info.