It can often take up to 48 hours for the DNS zone transfers to replicate to some ISPs and for you to reach your website with us using your domain name. In the case that it has been longer than 48 hours make sure you have typed the DNS names correctly with the registrar you purchased your domain from. The correct nameserver spelling is listed in your welcome email. Be sure to restart your computer to clear your locally cached server information. You may contact us for help at this address...
https://www.ultrawebhosting.com/contact