Subnet calculator

Type any IPv4 prefix to see its range, usable hosts and netmask.

IPv4 prefix

Try 10.0.0.0/8, 192.168.1.0/26 or 203.0.113.17/29

Usable hosts—

Total addresses—

Network—

Broadcast—

First host—

Last host—

Netmask—

Wildcard—

Need the full table? See the IPv4 cheat sheet.