DNSDig is a web version of dig. Allows you to query for a domain's DNS from any machine on the internet. Has very comprehensive results.

Online utility for DNS administrators. Test your DNS servers, domain registration, mail and web servers.

A gateway for: finger, nslookup, WHOIS, SSL, traceroute, ping, and dig.

Check the delegation of your domain. Has interesting graphical results.

Offers a user friendly web interface to dns lookup, WHOIS and IP tools.

Provides a free DNS report on your domain name, verifying that your DNS hosting is working properly. Includes over 40 different tests, looking for both minor and major problems.

Handy web-based DNS lookup service, with links.

Many free web-based DNS and domain name tools all in one location. Includes standard DNS lookups, WHOIS/IPWHOIS, and even obscure DNS hosting tests, IPv6, IP-to-country and spam database lookups. Fast and thorough.

Domain Name System Utility, online web interface to query DNS, Whois, Nslookup and Domain Names by IP address, Host address, Domain Name, URL.

Provides ping, traceroute, whois, finger, nslookup, and dig.

Free basic web based DNS lookup: including MX, CNAME, NS, A and PTR Records.

Web-based nslookup tool that lets you look up IP address information. Query their and other DNS domain name servers to look up and find IP address information of computers on the internet.

Provides basic forward and reverse DNS lookups, as well as MX record and server software lookups.

Offers some ping, tracert, nslookup, and basic WHOIS for web users.

Find IP-based virtual hosts in a given address block, Query by IP Address, Host Address, Domain Name, URL

Complete DNS traversal check. Shows you every DNS server that is (or may be) used for a DNS lookup, very comprehensive.

You can query any domain here to find the DNS information similar to a nslookup. Links to whois information.

Free online DNS Dig tool, similar to the UNIX "dig" command.