There are many reasons for this. Most common ones are:
Newsly purchased domain name
From the time we will agree with you for the purchase of a domain name, it takes a few hours for the domain name to be live on the internet. This does not depend on us but on the domain registrar. Experience showed that a max of 3 hours is needed for the domain name to resolve
From time to time we do server maintence but this does not affect site resolving. In case that the maintenance is anticipated to affect your website resolving then we notify you 2 weeks before and we do maintenance late in the night.
Try to clear your cache, restart your computer and try again. For more information how to clear your cache click here.
If none of the above helps then contact us here