The Do4movies website has shut down and the domain is for sale. There is a contact number for anyone interested in purchasing the website and domain name.
Other websites also link to the Do4movies site, but these sites offer their own streaming movie services. These sites may also redirect to other sites beyond their own, which could lead to an issue with malware or spam. The site may return to service if someone purchases it or the owner decides to redo the website and open it back up to the public. The ability to use the site for free if this situation occurs will depend on the management of the site.