Online Trace Route
Trace routing to your intended target can give you an excellent picture of the makeup of the infrastructure within your network and externally and is a good way of getting some idea of the network you are dealing with to enable you to target devices and hosts more discriminately.
There are a number of sites that offer trace routing services and rather than being another one amongst the plethora of those out there already, I thought I would provide a number of helpful links:
A more comprehensive listing of sites can be found here.
For general network and web testing tools, you also may want to try dotcom-monitor