If you see a website not found result, and you're sure you entered the website's name correctly and that there really is a website by that name, then you can be reasonably sure that, at least for the moment, your ISP's DNS system is having problems.
Ọ bụrụ na ịnweta 'ebe nrụọrụ weebụ a na-achọtaghị,' ị kwenyesiri ike na i tinyela aha na saịtị ahụ n'ụzọ ziri ezi (nakwa na e nwere ebe nrụọrụ weebụ na aha ahụ), mgbe ahụ, i nwere ike inwe ezigbo obi ike na, ọ dịkarịa ala maka oge ahụ , usoro ISP nke DNS gị nwere nsogbu.