There are many ways to gain access to a blocked website, including loading the cached version of the blocked webpage, entering the IP address instead of the URL into the browser's search bar or using one of many proxy websites. Not all programs used to block websites are the same, which means success varies with certain techniques.
Most major search engines offer the cached version of search results. Cached links can actually bypass censorship of websites. Accessing the text-only versions of websites also unblocks these sites.
Many blocked websites use simple software. Simply typing the IP address of the desired website into the browser's search bar usually bypasses them. Pinging the website's domain name using the command prompt yields the IP address. However, more robust censorship programs map the IP address to the website's domain, rendering this technique ineffective.
There are also many proxy websites that operate free of charge. Proxy websites commonly work the same. By entering in the blocked website's URL, the proxy acts as an intermediary, hiding from service providers the identity of the blocked website and then presenting the website's contents to the user.
There are more nuanced techniques to unblocking websites. For instance, instead of using the IP address of a blocked website, a search engine can find the decimal equivalent of the IP address. Sometimes, the decimal bypasses a censorship program more effectively.