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: 247.128.3.248/30
Addresses: 4 (2²)
First IP: 247.128.3.248 (248.3.128.247.in-addr.arpa)
Last IP: 247.128.3.251 (251.3.128.247.in-addr.arpa)

Owned By: IANA (Reserved (Future Use))
/8 Operated By: IANA (Reserved (Future Use))

Related Networks

247.0.0.0/8
246.0.0.0/8
248.0.0.0/8
247.128.3.248/29
247.128.3.248/32
247.128.3.251/32

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