ipxer
ipxer.com displays information about IP addresses and domain names. Queries can be entered directly into the URL bar for quick access. Examples:
- IP information and geolocation: http://ipxer.com/157.166.224.25/
- Domain information and geolocation: http://ipxer.com/djangosites.org/
- Various DNS Lookups: http://ipxer.com/mit.edu/mx/
- RBL/DNSBL (spam blacklisting) reports: http://ipxer.com/216.1.200.0/dnsbl/
- CIDR summaries: http://ipxer.com/18.9.22.69/24/
