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: 87.128.0.236/31
Addresses: 2 (2¹)
First IP: 87.128.0.236 (236.0.128.87.in-addr.arpa)
Last IP: 87.128.0.237 (237.0.128.87.in-addr.arpa)

/8 Operated By: RIPE NCC

Related Networks

87.0.0.0/8
86.0.0.0/8
88.0.0.0/8
87.128.0.236/30
87.128.0.236/32
87.128.0.237/32

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