How do i generate Ip addresses from Regular Expression

You would need to loop through the target addresses to test each one against your pattern to determine a match.  Another option would be to have all IP addresses in a text file in which you match each line against the pattern.  There really isn't a simple function to do this well that I am aware of, what is the goal?

Note that . chars need to be escaped in regex patterns, as you did in one place but not the others, also in the one place where you did escape the . you seem to have an extra unescaped . before it.

I am doing a program that will fetch the name of the computers available over a network. In order to get the computer name i need to provide the Ip address. There are many subnets available over the network. It is very difficult to enter all the IP addresses.
So, i thought i could use Regular Expression to avoid this difficulty.
I thought this could be generalized and used for any network.

Thanks for the question and the points.