The hosting can be active, but if the domain name is deactivated, you won't be able to see your site.
Just check a whois utility to see if that's the case.
If you're on a shared hosting environment, you can still FTP into your site by using the provider's domain name in the place of your own. That way you can update pages while waiting for the domain to be reactivated.
Originally posted by VanHost The problem has happened on a couple of customer's sites. Their domains haven't expired, however, one was recently renewed.
Haven't had any problems with the DC's recently (NAC / Burst)
The sites in question are running fine on the server. I've tested them by using their IP addresses. All servers are full systems go.
To me it seems like a problem with the registrar/registrar's DNS servers...
Next time it happens run a dnsreport.com on the domain and see what you come up with - it has always been an invaluable tool when i've dealt with such problems.
Does this happen only from your location, or can others also not see the website? Usually if it's a registrar DNS problem, this shouldn't have any real effect on the availability of the site, provided the DNS servers are not down for a couple hours at a time. Routers do cache domain DNS's, and if it is the registrar, most people should still be able to access the site. DNS issues are always sketchy, they work sometimes, and not others depending on routers, other servers etc.... Server issues will always work all the time, or none of the time. It's up to you to determine which it is and then seek out the appropriate problem.