When you change your DNS settings, it takes up to 24-48 hours for those changes to propagate across the internet. This is called propagation time, and it’s a standard delay that Internet Service Providers around the world need in order to detect DNS changes. Frequently, DNS changes can propagate within a few hours to most locations.  If you already have a website, it’s recommended to clear your browser cache after making DNS changes, as sometimes browsers will cache an old copy of a website from the previous server.