Domain Tools: Domain Name Search Made Easy with Our Free Tools | Foundr
What Is Reverse DNS and How Does It Work? {How to Do a rDNS Lookup}
DNSlytics on Twitter: "Our reverse and domain tools are now returning Alexa ranking, Pagerank and WOT reputation for every domain. Also the number of exact matched domains on different TLDs is displayed.
DomainTools Alternatives and Similar Sites / Apps | AlternativeTo