TwoFiftyFive

This app does not have any Ads. I personally have always despised them and therefore decided not to even bother.
This is a subnet calculator. It can be used to input subnets that you are aware of and store them in your app as well as create notes about hosts on that subnet that you want to remember. The calculation will give all details including Network Address, First Usable, Last Usable, Broadcast Address, Subnet Mask, and Inverse Mask for people configuring OSPF or any other protocol that may require it.
For quick calculations you can input how many hosts you have plus a 5 year percentage of growth and you will receive a sample subnet of what you could use as well as the number of hosts you will have in that subnet to accommodate the growth you specified.
When storing multiple subnets in the same location you can swipe the existing name and choose ADD or you can just click the create button and use the same name.
Once the App is on the store the next feature coming soon is the CloudKit feature so that no matter what device you are on with this app the data will be there.