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: 129.248.0.0/19
Addresses: 8192 (2¹³)
First IP: 129.248.0.0 (0.0.248.129.in-addr.arpa)
Last IP: 129.248.31.255 (255.31.248.129.in-addr.arpa)

/8 Operated By: ARIN

Related Networks

129.0.0.0/8
128.0.0.0/8
130.0.0.0/8
129.248.0.0/18
129.248.0.0/32
129.248.31.255/32

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