Because Interstellar is open-source, there isn't just "one" website for it. There are thousands of copies (mirrors) hosted by different people.
The Search Method: If you are looking for an active link, searching Google for "Interstellar unblocked" or "Interstellar proxy links" is the standard method. However, these links often get blacklisted by school filters quickly. interstellar web proxy
The Official Source:
The code is maintained on GitHub (usually under the user NebulaServices or similar variations). This is the safest place to view the code, but you cannot "use" it directly from GitHub without deploying it. Because Interstellar is open-source, there isn't just "one"
("The two hardest problems in computer science are cache invalidation and naming things.") If Earth updates a Wikipedia page in 2040, and a ship left for Proxima in 2039 carrying the old version, the Proxima proxy will serve the wrong data for 4 years. The proxy must maintain a Vector Clock of universal timestamps to know which data is "most correct" despite relativistic time dilation. The Official Source: The code is maintained on
In a conflict scenario, constant radio transmission reveals your location. An IWP allows "sneaker net" networking. A stealth probe flies into a system, dumps data to the proxy via a tight laser beam for 5 seconds, and leaves. The proxy stores the data, releasing it to the fleet weeks later. No continuous signal.