Enter the network you wish to subnet and use the Split/Join buttons on the right to start designing!
Range of addresses
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Copy the content from the box below to EXPORT the current subnet configuration. Or, overwrite/paste a previously exported configuration into the box below and click IMPORT.
About Visual Subnet Calculator
Visual Subnet Calculator strives to be a tool for quickly designing networks and collaborating on that design with others. It focuses on expediting the work of network administrators, not academic subnetting math.
Simplicity is king. Network admins are busy and Visual Subnet Calculator should always be easy for FIRST TIME USERS to quickly and intuitively use.
Subnetting is design work. Promote features that enhance visual clarity and easy mental processing of even the most complex architectures.
Users control the data. We store nothing, but provide convenient ways for users to save and share their designs.
Embrace community contributions. Consider and respond to all feedback and pull requests in the context of these tenets.