The project hosting site GitHub is currently inaccessible from China, cutting off the country’s developers from the valuable resource. A ViewDNS.info check shows that the service cannot be looked up throughout China. The blocking is frustrating many Chinese developers who cannot access one of the world’s major repositories of open source software. As the country’s firewall controllers rarely give any information on why sites are blocked, it is suggested by some that github.com is being blocked because of a dispute over a train ticket booking plugin.