IP Subnet Calculator

Professional IPv4 subnetting tool

Network Configuration

IPv4 Address

CIDR Prefix

/0 /8 /16 /24 /32

Higher prefix = smaller network

Total Addresses

0

Usable Hosts

0

Network Class

-

Subnet Type

-

Network Details

Network Address -

Subnet Mask

- (/0)

Wildcard Mask -

Binary Network -

Broadcast Address -

First Usable -

Last Usable -

Binary Mask -

Subnet Visualization

Special Note

Subnetting Basics

What is CIDR?

Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing. The CIDR notation includes the IP address followed by a slash and the prefix length (e.g., 192.168.1.0/24).

Network Bits (Fixed)

Host Bits (Variable)

Common Subnet Masks

/24 (255.255.255.0) 256 addresses

/16 (255.255.0.0) 65,536 addresses

/8 (255.0.0.0) 16.7M addresses

/30 (255.255.255.252) 4 addresses (2 usable)

IP Subnet Calculator © 2023 | Uses IPv4 standards

For educational and professional network planning.