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VLSM Planner
Free VLSM subnet calculator: split an IPv4 block into subnets of different sizes based on host requirements, with allocation that respects CIDR alignment for each block.
Address/prefix format, e.g. 192.168.1.0/24
»» allocated plan — 84/256 addresses
NameNetworkUsable rangeBroadcastHosts
User LAN
192.168.1.0/26
192.168.1.1–192.168.1.62 bc 192.168.1.63
62h requested 50
User LAN192.168.1.0/26192.168.1.1–192.168.1.62192.168.1.6362h /50
Servers
192.168.1.64/28
192.168.1.65–192.168.1.78 bc 192.168.1.79
14h requested 10
Servers192.168.1.64/28192.168.1.65–192.168.1.78192.168.1.7914h /10
P2P Link
192.168.1.80/30
192.168.1.81–192.168.1.82 bc 192.168.1.83
2h requested 2
P2P Link192.168.1.80/30192.168.1.81–192.168.1.82192.168.1.832h /2