Traceroute is a command which can show you the path a packet of information takes from your computer to one you specify. It will list all the routers it passes through until it reaches its destination, or fails to and is discarded. In addition to this, it will tell you how long each 'hop' from router to router takes.

In Windows, select Start > Programs > Accessories > Command Prompt. This will give you a window like the one below.

Enter the word tracert, followed by a space, then the domain name.

The following is a successful traceroute from a computer in Australia to google.com.au:

Firstly it tells you that it's tracing the route to google.com.au, tells you the IP address of that domain, and what the maximum number of hops will be before it times out.

Next it gives information about each router it passes through on the way to its destination.

1 is the internet gateway on the network this traceroute was done from (an ADSL modem in this case)
2 is the ISP the origin computer is connected to
3 is also in the isp's network
4 is a PIPE NETWORKS router
5 - 15 are all routers used within the network route to the destination domain
16 is google.com.au

Each of the 3 columns are a response from that router, and how long it took (each hop is tested 3 times). For example, in line 2, the first try took 49ms (49 milliseconds), the second took 48ms, and the third took 47ms.

You will also notice that the time it took quadrupled while passing through the network.

This is extremely useful when trying to find out why a website is unreachable, as you will be able to see where the connection fails. If you have a website hosted somewhere, it would be a good idea to do a traceroute to it when it is working, so that when it fails, you can do another traceroute to it (which will probably time out if the website is unreachable) and compare them. Be aware though, that it will probably take a different route each time, but the networks it passes through will generally be very similar.
If the example above had continued to time out after line 9, you could suspect that global-gateway.co.nz was the problem, and not google.com.au
If it timed out after line 1, you would know there was a problem connecting to your ISP (in this case you would not be able to access anything on the internet).

It is generally recommended that if you have a website that is unreachable, you should use both the traceroute and ping commands before you contact your us to complain. More often that not, there will be nothing to your ISP or Hightek Hosting can do about it and it will resolve itself in due course.

You can then select the tracert with your mouse by right-clicking on the window, selecting "MARK", highlighting all the text required and press "ENTER" to copy the details, then paste them into an email or support ticket.

Add to Favourites
Print this Article