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: 57.255.255.40/31
Addresses: 2 (2¹)
First IP: 57.255.255.40 (40.255.255.57.in-addr.arpa)
Last IP: 57.255.255.41 (41.255.255.57.in-addr.arpa)

/8 Operated By: RIPE NCC

Related Networks

57.0.0.0/8
56.0.0.0/8
58.0.0.0/8
57.255.255.40/30
57.255.255.40/32
57.255.255.41/32

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