Whats My DNS - Instantly check your domain names current IP address and DNS record information against multiple name servers located in different parts of the world.
ViewDNS.info - Free DNS related tools including Reverse IP Lookup, DNS Propagation Checker, Chinese Firewall Test...
Domain Details - Displays Server Type, Headers, IP Address, Location Flag, and links to Whois Reports.
NsLookup.io - A simple and powerful tool for querying DNS records
DNS Checker Tool - Check Domain Name System (DNS) records for any website.
Domains Index - Lists of all registered domains, registered domains database, bulk WHOIS database.