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Free tools · Networking
VLSM Planner
Divide an IPv4 network, allocate the largest blocks first and export a plan without overlaps.
All tools
IPv4 subnetting
VLSM plan
Converter
ACL helper
Network and requirements
Base network /CIDR
Hosts required for each subnet
Use /31 for requests with 2 hosts (point-to-point) and /32 for requests with 1 host.
Generate VLSM plan
Try an example
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Copy results
Export CSV