Yeah, this is something you just make up to suit your needs. Personally, I have mine grouped by type of device in ranges that would allow for breaking them off into very fine-grained real subnets later if I want to. ie: 1-14 17-30 33-46 49-62 65-78 81-94 97-110 113-126 129-142 145-158 161-174 177-190 193-206 209-222 225-238 241-254 As you can see, I'm not using any of the numbers that would become the network or broadcast address for any /28 network. - Tony Yarusso