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: 5.128.12.64/31
Addresses: 2 (2¹)
First IP: 5.128.12.64 (64.12.128.5.in-addr.arpa)
Last IP: 5.128.12.65 (65.12.128.5.in-addr.arpa)

/8 Operated By: RIPE NCC

Related Networks

5.0.0.0/8
4.0.0.0/8
6.0.0.0/8
5.128.12.64/30
5.128.12.64/32
5.128.12.65/32

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