Can one observe the IP address of his entry node with "tracert"? In fact, what type of information does "tracert" is able to observe on Tor network?
However, it's also possible to send
SYN's to do essentially the same thing. If you used
traceroute to print a series of
SYN-ACK's, you would see the path from the exit node to the final destination (as if you'd run the traceroute from the exit node).
tracert is a Windows only utility; every other operating system calls it
traceroute. I have no idea if the Windows version behaves the same way as normal
If all you want to do is find the IP address of your entry node, you can simply ask Tor for information about the current streams. There should be several questions on here about how to do that, or you can use a UI such as Arm.