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: 115.128.1.56/31
Addresses: 2 (2¹)
First IP: 115.128.1.56 (56.1.128.115.in-addr.arpa)
Last IP: 115.128.1.57 (57.1.128.115.in-addr.arpa)

/8 Operated By: APNIC

Related Networks

115.0.0.0/8
114.0.0.0/8
116.0.0.0/8
115.128.1.56/30
115.128.1.56/32
115.128.1.57/32

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