Search for a domain name. Check your name servers - Check transport speed Stats on the Backbone Looking Glass - Check BGP and ASN   23454
RFC Index - Lookup The living internet - Research and Tools
Internet Pulse - Latency by Carrier ASP 101 - ASP Source
Lockdown - Stealth Testing Wayback Machine - Archive
Eliminate SPAM - Mail Wiper Ad-Aware - Get rid of spyware, adware and parasites
Everyone has been to PC Hell at one time or another. What is my IP - Verify your IP or Gateway
IP Address Space - All IP address space world wide SMTP - SMTP Test Utility
NS Lookup - List site records Expert Exchange - Providing IT info that drives the enterprise
RFC 1700 Port Assignment IP Sentry for NorthRidge - Monitoring
Root Servers - Name Servers chMS Discussions - Church Management Systems