Some time ago I needed to find all subdomains for a list of domains. I couldn't find ready to use software. All I found was expensive or worked not as I needed. The solution is quite easy if you have ability to send DNS queries. I used ls command in Windows nslookup utility. To make the task easier, I decided to develop my own solution.
Now I'm working on a new module for CyD Network Utilities program. The module will be able to work with any DNS server. I already implement all basic DNS request and even subdomains searching. To search subdomains the programs uses intellectual algorithm, that search DNS server that contain all information you need.
The DNS module is going to be included in the next update. All registered users are going to get the module absolutely free-of-charge.