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CIDR / Subnet Calculator
Parse CIDR blocks to get network details and plan VPC subnets — all in your browser.
CIDR Calculator
Private/24 — 256 total hosts
IP Address
10.0.0.0
Network Address
10.0.0.0
Broadcast Address
10.0.0.255
First Usable IP
10.0.0.1
Last Usable IP
10.0.0.254
Total Hosts
256
Usable Hosts
254
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
VPC Subnet Planner
Enter a base CIDR and number of equal-sized subnets to generate. Max 64 subnets.