I thought it may be useful to post the location change of Network Utility in OS X Mavericks. I know I find it useful. I do not know why it moved, but it has.
Previously:
/Applications/Utilities
Now:
/System/Library/CoreServices
Alternatively, you can launch it from the System Information menu, under ‘Window’ (see screenshot).
![Launch Network Utility under Mavericks](http://trevweb.me.uk/wp-content/uploads/2013/10/network_utility_mavericks.png)