Network Tools
Traceroute, Ping, Domain Name Server (DNS) Lookup, WHOIS, and DNS Records Lookup tools
Whois, Ping, Port Scanner, NSlookup,Port Scan and Traceroute Online Server Tools

Online Internet Service Tools: nslookup, dig, ping, traceroute and more (nslookup, dig, whois, ping, traceroute, serverinfo, dnsbl-check, etc...) is a large collection of traceroute, looking glass, route servers and bgp links
The Security Portal for Information System Security Professionals : IP Tools, Network Tools, Online Tools, Whois, Ping, Reverse Look Up, Anti Spam, Hacking And Hackers

A lot of tools and topics: security, privacy, anonymity, networking, anonimity, proxy, hack, scan, tools, documentation, online tests, whois, ping, traceroute, news, tips, initiatives, resources and more.

Malcolm's Cool Tools

DNS Tools
whois, ping, traceroute, dns, etc...
Domain name search tool; allows wildcard search of current and deleted/expired whois domains.
DNSstuff: Free fast, advanced and comprehensive web-based DNS and domain name tools for DNS hosting, going beyond just ping, tracert/traceroute, WHOIS and DNS lookups.

DNS Report
This site will provide you with a DNS report for your domain. A very large percentage of domains have DNS problems; this site will help you find those problems and fix them. Also, the "Mail Test" tool will help find mail delivery problems for your domain. This site is a sister site to, which has many other DNS and networking tools.

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