Ever find yourself in a situation where a web site is loading on one device and not another? Or, perhaps, you just registered a new domain name and your browser is not finding it? One possibility is that your DNS cache needs to be flushed.

DNS is the phone book of the Internet, translating the human-friendly domain names (like loopinsight.com) into IP addresses, then back again. When domain names change, it takes some time for those changes to propagate through all the routers, devices, and browsers. Flushing your DNS cache gets rid of remembered DNS information and forces your device to retrieve new DNS.

The link above tells you how to flush the DNS on your computer. You’ll need to use Terminal, so ask a friend if you’ve not used it before. On your iOS device, turn on airplane mode, then turn it back off. That should do the trick.