Network Address Calculator

Find network address of any IP/prefix. IP bitwise-AND mask.

IP address

Prefix

Network address192.168.1.128

How to read the result

Network = IP AND mask. Host bits zeroed. First address of subnet, never assigned to a host.

Example

192.168.1.130/25 → network 192.168.1.128

FAQ

Network vs first usable?

Network is .0-style base. First usable is network+1.