If you are a user on the network you can use AD Explorer this should allow you to READ AD but it is possible you will receive an error....
If you need a list of machines on the network i would suggest that you ask an administrator as this may break your company policy and could depending how strict the network is lose you your job...
WinXP and up have you covered:
That'll give you a list of all of the computer-objects in the AD tree. dsquery allows fancier filtering as well if you need it. A useful tool!
If you are a user on the network you can use AD Explorer this should allow you to READ AD but it is possible you will receive an error....
If you need a list of machines on the network i would suggest that you ask an administrator as this may break your company policy and could depending how strict the network is lose you your job...
PowerShell can do this with one line (not sure if this works on 2003 domain though):
You may need to import the activedirectory module first. So your first line in the powershell window might need to be: