Reverse IP Lookup
Find all sites hosted on a given server.

Domain / IP

Reverse Whois Lookup
Find domain names owned by an individual or company.

Registrant Name or Email Address

IP History
Show historical IP addresses for a domain.

Domain (e.g. domain.com)
DNS Report
Provides a complete report on your DNS settings.

Domain (e.g. domain.com)

Reverse MX Lookup [NEW]
Find all sites that use a given mail server.

Mail server (e.g. mail.google.com)

Reverse NS Lookup
Find all sites that use a given nameserver.

Nameserver (e.g. ns1.example.com)
IP Location Finder
Find the geographic location of an IP Address.

IP

Chinese Firewall Test
Checks whether a site is accessible from China.

URL / Domain

DNS Propagation Checker