Online dnslookup is a web based DNS client that queries DNS records for a given domain name. It allows you to view all the DNS records for a website. It provides the same information as command line tools like dig and nslookup, from the convenience of your web browser. nslookup.io does not cache the DNS responses it shows, but the DNS servers that are queried usually do respond with a cached record set. Except for authoritative DNS servers. They never serve cached DNS records.