asking domain like co.cc

I think www.co.cc already stop their business. is there any site where i can get free domian like co.cc

Web hosting provider that you can go for. There are many hosting providers will pay for your domain registration but you have to purchase a hosting package with them. Some hosts are there,
Bluehost,
DreamHost,
Green Geeks,
Hostmoster....Good Luck

but they take additional charge for the domain service.