IPv4 Subnet Calculator

Developer · v1.0.0 · runs fully in the browser, data never leaves your device

IP or CIDR

Network address192.168.1.128

Broadcast address192.168.1.191

Subnet mask255.255.255.192

Wildcard mask0.0.0.63

Usable range192.168.1.129 — 192.168.1.190

Usable hosts62

CIDR notation192.168.1.128/26

Address typePrivate (192.168/16)

Binary view

11000000.10101000.00000001.10000000

11111111.11111111.11111111.11000000

Is an IP in this subnet?

Split subnet

Target prefix/26 → /28

Splits into 4 subnets

192.168.1.128/28

192.168.1.144/28

192.168.1.160/28

192.168.1.176/28

/31 and /32 follow RFC 3021 (no subtraction of network and broadcast addresses). IPv4 only; use a dedicated subnet calculator for IPv6.

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