How do I find the network address?

Perform a bitwise AND between the IP address and the subnet mask. Bits that stay set form the network ID. Enter the IP and mask here to see the result instantly.

What is a network address?

It is the first address in a subnet and identifies the network as a whole. Hosts use addresses after the network ID; the last address is reserved as broadcast on a standard LAN.

How do I calculate a network address from CIDR?

Convert the CIDR prefix to a mask, then AND it with the IP. Example: 192.168.1.37/24 yields network 192.168.1.0.

Can I find the network address from an IP and mask?

Yes. That is the primary job of this calculator, paste both values and read the network ID plus supporting host range details.

What is the difference between network and host addresses?

The network address names the subnet. Host addresses identify individual devices inside it. You assign host addresses to interfaces; you do not assign the network ID to a device.

What is Network Address Calculator?

A free online tool that derives the IPv4 network ID from an address plus CIDR or subnet mask, built for CCNA practice and admin checks.

How does the Network Address Calculator work?

It converts your mask to a 32-bit pattern, applies it to the IP, and reports the network ID along with broadcast and usable host bounds for context.

How do I use the Network Address Calculator?

Type an IP and a prefix or mask. Results update as you type on desktop or mobile.

Is this Network Address Calculator free to use?

Yes. No registration is required for students, engineers, or home-lab use.

Can I use the Network Address Calculator on mobile?

Yes. It works in a phone or tablet browser for quick checks during labs.

Free Network Address Calculator, Find Network ID from CIDR

Free Network Address Calculator, Find Network ID from CIDR | Binary Tech