Boardwatch List of Traceroute sites
ARIN Introduction
Lyceum Network Tools>
DIGEX - MAE-East++ Looking Glass (BGP Lookups)
BGP AS Number List
Internet Dig

Network Time Protocol
Internet Names Australia - Domain Name Registration Main
Australian Network Information Center
Asia Pacific Network Information Center
The New Internic - Network Solutions
Wordsmith great for word jokes.
IANA Assigned Numbers for Everything
Assigned Numbers for Everything