A common and useful network utility, nslookup, is present on most Unix, Windows NT and Windows 2000 systems, but
sadly lacking on Windows 95, Windows 98 and Windows ME systems. To fill this void, PC Pitstop has developed
a simple command-line utility, nslook, that performs two of nslookup's most useful functions: It determines
an IP address from a DNS name, and a
DNS name from an IP address (DNS address
www.pcpitstop.com, for example, corresponds to IP address
What are the uses for this utility? Here are some examples of when to use nslook:
Note: This utility is copyrighted, but free to all PC Pitstop users.
DNS, the Domain Name System, maintains a distributed database of host names (domain names) and their associated IP addresses. The nslook utility sends its name resolution and address-lookup requests to whatever DNS server is currently configured for your Internet connection.
To install nslook, download
the utility from one of the links to the right and save it to any directory, such as
on the path on your system (i.e., any of the directories Windows automatically checks when
trying to run a program--type
PATH at a DOS prompt to see which directories are
defined for your PC's path). This way, you can run the utility from any directory in DOS.
There is no further installation.
To use nslook, first open a DOS box, MS-DOS Prompt or Command Prompt window (click here for instructions on opening these windows).
From the command line,
nslook followed by the DNS names and/or
IP addresses you wish to look up,
separated only by spaces. (
<address> below stands for one or more DNS or IP addresses)
The nslook utility will send each argument (address) to your computer's DNS server for resolution and display the result.
Here's an example of its usage and typical results. In this case, we are looking up four addresses:
nslook www.pcpitstop.com internic.net 18.104.22.168 22.214.171.124