there are times when the site is not open, some people suspect that the domain name is out of order, although the possibility of the existence of domain name failure, but the probability is very small, it is generally difficult to hit a.
URL forward, then the major domestic registers are occasionally problems, there are few very stable.
if parsing to space, want to check the domain name MYDNS is effective.
if PING get your domain name, get the IP, such as you do in the analysis of the point of the IP, it means that the resolution took effect, or that is not valid.
due to the computer may exist in the cache, it is recommended to test their own at the same time, ask a friend to help PING about the results. If you do not get IP, or get a different IP that does not take effect.