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: 167.243.20.128/31
Addresses: 2 (2¹)
First IP: 167.243.20.128 (128.20.243.167.in-addr.arpa)
Last IP: 167.243.20.129 (129.20.243.167.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

167.0.0.0/8
166.0.0.0/8
168.0.0.0/8
167.243.20.128/30
167.243.20.128/32
167.243.20.129/32

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