I currently have one site in Active Directory and its network is 10.10.x.x 255.255.0.0. I will be adding 2 more remote sites for a total of 3. So I need to subnet the 10.10.0.0 network. I am hoping to do it in a way that has the least amount of disruption to my current scheme. If I use a 19 bit mask (255.255.224.0) it will give me 8 subnets: 10.10.0.0
I would love to use the first 3, 10.10.0.0,.32.0 and .64.0 for my 3 sites. But every subnet calculator does not include the 10.10.0.0 subnet. Why is that? Why can't I use the 10.10.0.0 -10.10.31.254 network?