Engineering toolkit
Network tools.
Small utilities that stay focused on the engineering task. The IPv4 calculator below runs entirely in your browser—no address data is uploaded.
IPv4 Subnet Studio
Enter an IPv4 address and CIDR prefix to calculate the subnet boundaries and address space.
Results
Network boundaries are calculated locally in JavaScript.
Network10.20.30.0/24
Subnet mask255.255.255.0
Wildcard0.0.0.255
Broadcast10.20.30.255
First address10.20.30.1
Last address10.20.30.254
Total addresses256
Usable addresses254
00001010.00010100.00011110.00101100 11111111.11111111.11111111.00000000 /24
Roadmap
More useful tools, same design language.
Next candidates are the rack designer and a Junos configuration builder, both designed to produce structured, reviewable output.
PHYSICALDESIGNING
Rack Designer
Rack, port and cable documentation with traceable relationships.
JUNOSPLANNED
Config Builder
Repeatable interface, VLAN, OSPF and BGP configuration generation.
IPAMPLANNED
Address Planner
VLSM, point-to-point allocation and exportable addressing plans.