title: Unable to create subnet in VPC - getting "Not with in Range error"
body: <p>I have VPC with subnet 172.16.0.0/28 in AWS.</p>
  
  <p>I am getting error while creating 2nd Subnet for our NAT instance. </p>
  
  <p>Eg, Getting Error if i try this subnet "172.16.0.0/24 is not within the range of 172.16.0.0/28"</p>
  
  <p>and getting this error if  i try "CIDR block 172.16.0.6/28 overlaps with pre-existing CIDR block 172.16.0.0/28"</p>
  
  <p>Isn't possible to create subnet for this /28 range. I am not as good in Subnetting- Network. </p>