IP Subnet Calculator
Calculate network subnets, including network address, broadcast address, host ranges, and wildcard mask from an IP and CIDR.
Parameters
Enter a valid IPv4 address
Prefix length (0-32)
Results
Why Choose IP Subnet Calculator
Easily calculate network specifications with the IP Subnet Calculator. Determine subnet masks, wildcard masks, network and broadcast addresses, and usable host ranges based on any IPv4 address and CIDR prefix. A must-have tool for network administrators and DevOps engineers configuring cloud VPCs, routing tables, and local networks. Computes instantly in your browser.
- ✓Calculate Network and Broadcast Addresses instantly
- ✓Determine Subnet Mask and Wildcard Mask automatically
- ✓Find exact usable Host Ranges and total host counts
- ✓Fully supports edge cases like /31 and /32 subnets (RFC 3021)
- ✓Client-side processing guarantees your internal network IPs remain private
How to Use
- 1Enter a valid IPv4 address (e.g., 192.168.1.10).
- 2Specify the CIDR routing prefix (a number between 0 and 32).
- 3Review the computed network address, broadcast address, and host ranges.
- 4Copy the calculated configurations directly to your clipboard.
Frequently Asked Questions (FAQ)
What is a CIDR prefix?
Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing. The prefix indicates how many bits are used for the network portion of the IP address.
Why are there 2 fewer usable hosts than total hosts?
In standard subnets, the first IP address is reserved for the Network Address, and the last IP address is reserved for the Broadcast Address, leaving the remaining IPs for usable hosts.
Is my IP data stored on your servers?
No. All calculations are strictly performed inside your browser. We do not store or track the IP addresses you input.
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