A simple DNS lookup tool. Get the DNS information of an IP address or domain. EDNS client subnet queries enabled.
DNS, which stands for domain name system, is an Internet service that translates domains names into IP addresses. This query is performed by a Domain Name Server (DNS server) or servers nearby that have been assigned responsibility for that hostname. You can think of a DNS server as a phone book for the internet. A DNS server maintains a directory of domain names and translates them to IPs.
An open IETF standard edns-client-subnet was developed in order to better direct content to users and lower latency in cooperation between recursive DNS services and CDN providers. For example, when using Open DNS or Google Public DNS, and you visit a website served from a CDN provider which supports EDNS client subnet, like KeyCDN, a truncated version of your IP is added to the DNS request, which then routes the client based on the geo location of the client subnet to the most optimal server.