Web Tools pages:
♦ DNS lookup - DNS lookup (either forward or reverse). Put in an IP address to get the hostname and put in a hostname to get the IP.
♦ Who am I? - Shows HTTP headers with reverse DNS lookup
♦ Whois lookup - Works on domain names and IPv4 IPs. Additionally returns IPs of domain names. No CAPTCHA, full email addresses viewable, the only obstacle is you can only lookup one per minute.