IPv4 Subnet Calculator

This calculator and tool allows you to type an IP address in and get information on a particular subnet. Enter an IP or range in CIDR notation.

Network: 241.128.0.242/31
Addresses: 2 (2¹)
First IP: 241.128.0.242 (242.0.128.241.in-addr.arpa)
Last IP: 241.128.0.243 (243.0.128.241.in-addr.arpa)

Owned By: IANA (Reserved (Future Use))
/8 Operated By: IANA (Reserved (Future Use))

Related Networks

241.0.0.0/8
240.0.0.0/8
242.0.0.0/8
241.128.0.240/30
241.128.0.242/32
241.128.0.243/32

You can also use some of the other examples such as:

0.0.0.0/0
1.0.0.0/8
127.0.0.1
30.0.0.0/8
192.168.0.0/16