CIDR Calculator was designed out of a desire to streamline CIDR calculations by creating a simple, easy to use tool for performing CIDR network block math and network masks with complete confidence.


A cornerstone of worldwide IPv4 network communications is Classless Inter-Domain Routing, also known as CIDR. CIDR blocks help routers move packets based on a shorthand method of telling another system what IP ranges the devices can route. Now, if you’re looking at this tool, you most likely know more about CIDR than I can possibly cover here, so I’ll focus on the unique features of this Application:

CIDR Calculator is a simple to use tool that allows rapid deconstruction and understanding of any valid CIDR block notation.


For example. You’ve received a block of IP’s from your ISP. Maybe they are add-ons to your existing network. Perhaps you are deploying a completely new network. When you look at the provisioning worksheet and see the notation 17.251.200.