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: 139.0.30.0/23
Addresses: 512 (2⁹)
First IP: 139.0.30.0 (0.30.0.139.in-addr.arpa)
Last IP: 139.0.31.255 (255.31.0.139.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

139.0.0.0/8
138.0.0.0/8
140.0.0.0/8
139.0.28.0/22
139.0.30.0/32
139.0.31.255/32

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