Cogent (AS174)

This Looking Glass provides you with information relative to backbone routing and network efficiency, providing you with the same transparency that customers on our network receive directly.

Traceroute allows a user to follow a packet through the network to a specific destination. It shows the domain, IP address, and the roundtrip packet times as it traces the route to the destination.

Ping can be used to show whether or not a device with a valid internet address or domain name can return packets sent to it by a specified server.

Princeton University (AS88)

You may use this tool to trace the current path from www.net.princeton.edu to another device on the Internet.

Please be patient while traceroute does its job... it may take a while.

University of Washington (AS73)

University of Washington Traceroute Gateway
Below is a gateway to the standard UNIX traceroute program which determines the route taken by packets across a network from one host to another. Type the destination host or IP address, and hit enter or click on the submit key

University of Wisconsin-Madison (AS59)

Traceroute from www.cs.wisc.edu University of Wisconsin-Madison (AS59)  to  ()

CGI script maintainer: Les Cottrell, SLAC. Script version 2.0, 1/14/2000.
To perform a traceroute from www.cs.wisc.edu, enter the desired destination host.domain or IP address below: