So do the registrars. I've seen reference to plans to rebuild the WHOIS database to permit this type of search, but I don't know when/if it'll happen, and if it does, I'm not sure that there will be any public access permitted. I'm not sure if Net Sol should even have the "name" search as it stands available
Most of the more advanced promoters tend to "cloak" their whois info as they don't want people knowing who they are or where they (especially in competitive searches). So if you are a competitor of theirs you will never know who the site actually belongs to.
RewriteEngine on
RewriteBase /
RewriteCond %{HTTP_USER_AGENT} ^Mozilla.*Indy [OR]
RewriteCond %{HTTP_USER_AGENT} ^Zeus.*Webster [OR]
RewriteCond %{HTTP_USER_AGENT} ^Microsoft.URL [OR]
RewriteCond %{HTTP_USER_AGENT} ^Wget [OR]
RewriteCond %{HTTP_USER_AGENT} ^ia_archiver [OR]
RewriteCond %{HTTP_USER_AGENT} ^DIIbot
RewriteRule ^.* - [F]