Subnet Calculator
Calculate network details from an IP and subnet mask.
calculator
network
A Developer's Guide to the Subnet Calculator
The Subnet Calculator is an essential tool for network engineers, system administrators, and developers. It takes an IPv4 address and a subnet mask (or CIDR prefix) and instantly calculates all the crucial information about that network segment.
Features
- Flexible Input: You can provide the subnet information in two common formats:
- CIDR Notation: e.g.,
/24 - Subnet Mask: e.g.,
255.255.255.0
- CIDR Notation: e.g.,
- Comprehensive Network Details: The calculator provides a complete breakdown of the subnet, including:
- Network Address: The first address in the subnet, which identifies the network itself.
- Broadcast Address: The last address, used to send messages to all devices on the subnet.
- Host Range: The first and last usable IP addresses that can be assigned to devices.
- Host Counts: The total number of hosts and the number of usable hosts (Total - 2).
- Wildcard Mask: The inverse of the subnet mask, often used in firewall access control lists (ACLs).
- IP Type: Classifies the input IP as Public, Private, or Loopback.
How to Use
- Enter IP and Subnet:
- In the IP Address field, enter the IP you want to analyze (e.g.,
192.168.1.10). - In the Subnet Mask or CIDR field, enter the network's subnet information (e.g.,
24or255.255.255.0).
- In the IP Address field, enter the IP you want to analyze (e.g.,
- View the Results: The "Subnet Details" table will automatically update with all the calculated network information. If your input is invalid, an error message will appear instead.