finding an ip address

wqe used to go into the command promt and ping ip addresses, but then they blocked it. They also blocke d jaanese website called wujie that would give use the IP address to still go into the blocked sites. The school system around here is rediculous and blocks everything that we need to do our work. I was wondering if anyone knows any websites where i can enter the weeb address and it then feeds me back an IP address for the site?