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Saved Tool Outputs & History

IP Subnet & CIDR Calculator

Calculate network address ranges, broadcast IPs, netmasks, wildcard masks, and usable host counts from CIDR blocks.

Calculate Subnet & CIDR Block Ranges Online

Enter an IP address and CIDR prefix (e.g. 192.168.1.0/24) to inspect network breakdown metrics, wildcard masks, usable host ranges, and IP class designations.

CIDR Notation: 192.168.1.0/24 Netmask: 255.255.255.0
Network IP: 192.168.1.0 Broadcast IP: 192.168.1.255
First Usable Host: 192.168.1.1 Last Usable Host: 192.168.1.254
Usable Hosts: 254 Total Addresses: 256
Wildcard Mask: 0.0.0.255 IP Type / Class: Private (Class C)
Subnet calculated automatically.

What is an IP Subnet & CIDR Calculator?

An IP Subnet Calculator parses IPv4 addresses and CIDR prefix notation to calculate network boundaries, broadcast addresses, usable host ranges, and wildcard masks required for router, cloud VPC, and firewall configuration.

How to use it

  1. Enter an IPv4 address into the IP Address field.
  2. Select the CIDR prefix or netmask (e.g. /24 or /16).
  3. Review the calculated network breakdown table and copy the summary.

SEO & Web Development Applications

Accurate CIDR and subnet calculations ensure proper network routing, firewall ACL configurations, security group isolation, and VPC architecture for high-availability web servers and database clusters.

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