DNS

Zenmap

Apple Business Contact Find Home Internet Linux Microsoft Office Security Utilities Whois

ip information

DNSGoodies.com
DNS tools, WHOIS, Open Relay Test, Reverse DNS,
Spam Database Check, traceroute, ping and other utilities
DNSInspect
Free DNS checking tool with IPv6 support
DNSstuff.com
DNS Network Tools: Network Monitoring and DNS Monitoring
MX Lookup Tool
Check your DNS MX Records online
Network-Tools.com
Traceroute, Ping, Domain Name Server (DNS)
Lookup, WHOIS, and DNS Records Lookup
What's My DNS?
Global DNS Propagation Checker