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: 161.0.15.54/31
Addresses: 2 (2¹)
First IP: 161.0.15.54 (54.15.0.161.in-addr.arpa)
Last IP: 161.0.15.55 (55.15.0.161.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

161.0.0.0/8
160.0.0.0/8
162.0.0.0/8
161.0.15.52/30
161.0.15.54/32
161.0.15.55/32

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