Check the httpd.conf file to make sure that there is a ServerAlias entry for both domain.com and www.domain.com
BGP Blend of Telia, GTT, Zayo, and Cogent in One Wilshire, Los Angeles!
True Definition of Managed Hosting
Proudly Offering Shared Hosting, Reseller Hosting, VPS, Dedicated Servers, and Co-location
most likely you do not have the www record setup right in your DNS or not replicated as mentioned before.... Check with your provider
GS RichCopy 360 Enterprise - Voted #1 for data migration and replication in terms of performance and features. Replicate data across between servers in the same network, WAS, or even across the internet
If this is a relatively new account, its probably a DNS caching issue with your ISP and you just need to wait a day or two for it to work itself out. What is the domain name, so that we can check it for you?
||| 99.999% Uptime SLA!!!
Plenty of space and bandwidth to fit your needs! www.AEIandYou.com - - (WP Friendly - Premium Reseller Hosting and Cheap Dedicated Servers)
Pretty much as the others said, check your DNS records;
Name - Type - Value
@ - A - 18.104.22.168
* - CNAME - domain.com.
Replace 22.214.171.124 with your site's IP address
Replace domain.com with your domain name (without leading www) - note that the . at the end is IMPORTANT
The * means that any prefix will direct to your site; e.g. ftp, mail, etc.
To limit it to specific prefixes then simply replace * with www or whatever
The * is an excellent way of creating dummy sub-domains as any prefix will be directed to your default directory. With some judicious scripting you can check what the prefix used was and server different content as appropriate; great for social sites as you can let people use <username>.domain.com to go straight to their personal home page.