.htaccess mod_rewrite help

need help rewriting multiple URLs

[ccbcreg]

i have about 30 urls i am pointing to an IP address. the desired result would be that all URLs (urls-name.com, urls2.com, etc..) get rewritten to the single URL ie www.url-name.com. i have tried several times and some do not work.. some create loops.

RewriteEngine on 
RewriteCond %{HTTP_HOST}    !^$
RewriteRule ^(.*)  http://www.url-name.com/$1 [L,R]

or

RewriteEngine on 
RewriteCond %{HTTP_HOST}    !^urls2.com(:80)?$
RewriteCond %{HTTP_HOST}    !^urls-name.com(:80)?$
RewriteRule ^(.*)  http://www.url-name.com/$1 [L,R]

any help would be appreciated.

btw. i know that

UseCanonicalName On

in the httpd.conf

[ccbcreg]

after a bit of testing i got it...

this works...

RewriteEngine on
RewriteCond %{HTTP_HOST}!^www.url-name.com(:80)?$
RewriteRule (.*) http://www.url-name.com/$1 [L,R]