Nslookup

Nslookup.exe is a tool for testing and troubleshooting DNS servers.

Example

To query for the Chicagotech.net MX record, type the following:
   C:\> nslookup
   Default Server: ns1.domain.com
   Address: 64.176.153.103
   > set q=mx
   > chicagotech.net

Troubleshooting Nslookup.exe

1. *** Can't find server name for address w.x.y.z: Timed out

Cause: the DNS server cannot be reached or the service is not running on that computer.

2. *** Can't find server name for address 127.0.0.1: Timed out

Cause: no servers have been defined in the DNS Service Search Order list

3. *** Can't find server name for address w.x.y.z: Non-existent domain

Cause: there is no PTR record for the name server's IP address.

4.*** ns.domain.com can't find child.domain.com.: Non-existent domain

5. *** Can't list domain child.domain.com.: Non-existent domain

Cause: No separate db file for the domain, thus querying that domain or running a zone transfer on it will produce the above errors.