Sorry but forgot to say I am using Microsoft 2003 server SP1 DNS.
Thanks,

 I can do a name lookup for anyone on the internet and it works just fine UNLESS there is an Alias involved with the name.

 Example 1 :
 C:\>nslookup nws.noaa.gov
 Server:  dns1.ksdot.org
 Address:  165.201.199.60

 Non-authoritative answer:
 Name:    nws.noaa.gov
 Address:  140.90.113.200

 Using the same domain but with the WWW preceding it... I get a time out every time.

 Example 2 :
 C:\>nslookup www.nws.noaa.gov
 Server:  dns1.ksdot.org
 Address:  165.201.199.60

 DNS request timed out.
     timeout was 2 seconds.
 *** Request to dns1.ksdot.org timed-out

 Using an outside company's DNS to query the same name again... I get an answer every time:

 Example 3 :
 C:\>nslookup www.nws.noaa.gov DNS.companyx.com
 Server:  DNS.companyx.com
 Address:  xxx.xxx.xxx.x

 Non-authoritative answer:
 Name:    prpx.service.mirror-image.net
 Addresses:  65.206.60.120, 65.216.72.120, 204.0.99.120
 Aliases:  www.nws.noaa.gov

 
 Any Ideas on what gives?
 Thanks,
 --
   RJH  

See if this helps:
828263 - DNS query responses do not travel through a firewall in Windows
Server 2003:
http://support.microsoft.com/default.aspx?scid=kb;en-us;828263&sd=RMVP