Alright.. Alright! everbody have their own method to reverse engineer a subnet… Here is a technic and way that works for me and might work for you.
Let’s take a random private ip.
And let’s try to figure out its network range.
In such case, we will take the lowest subnet octect, which here is 224 (remember that a subnet bit of 27 is 255.255.255.224)… let’s therefore convert it into binary.