IP Address Calculator
Validate an IPv4 address and check its class and public/private status.
Calculate
Enter your values below.
Result
Address class
0
Public or private
0
Formula used
The address class is determined by its first octet's range; private ranges (10.x, 172.16-31.x, 192.168.x) are reserved for local networks.
Example: 192.168.1.1 → Class C, Private.
How to use this calculator
- Enter IPv4 address.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What is an IP address class?
A historical scheme (A, B, C, D, E) that groups IPv4 addresses by their first octet's range.
What does 'private' mean?
The address is reserved for use within local networks and isn't routable on the public internet.
What is 127.0.0.1?
The loopback address, always referring to the local machine itself.
Does this validate IPv6?
No, this tool checks IPv4 addresses only.