IP · CIDR · Subnets

IPv4 subnet calculator

Enter any address and prefix — network range, broadcast, usable hosts, masks, and a bit-level view all update live. Paste CIDR notation like 10.0.0.0/8 to fill both fields at once.

Usable hosts

254

Network

192.168.1.0

Broadcast

192.168.1.255

Subnet mask

255.255.255.0

Wildcard mask

0.0.0.255

Address & prefix

IP address (paste CIDR like 192.168.1.0/24 to auto-fill)

Prefix

Drag to change prefix

Subnet details

Network address192.168.1.0

Broadcast192.168.1.255

First usable192.168.1.1

Last usable192.168.1.254

Usable hosts254

Total IPs256

Subnet mask255.255.255.0

Wildcard mask0.0.0.255

CIDR notation192.168.1.0/24

IP classClass C

Range typePrivate

Bit-level view — ■ network ■ host

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IPv4 only · /31 treated as point-to-point per RFC 3021 · /32 is a host route