Usable Hosts Formula

H = 2^(32-n) - 2

n = CIDR Prefix. Subtract 2 for Network and Broadcast addresses.

Results are estimates. Verify against vendor specs before deployment. Full disclaimer

Subnet Calculator

Calculate host range, subnet mask, and address boundaries from CIDR notation.

IP Address

CIDR Prefix: /24

/1/16/30

Subnet Mask

Usable Hosts
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Network: --

Broadcast: --

Host Range: --