Subnet Calculator
Calculate network masks and subnets.
/
How to Use Subnet Calculator
1
Enter a base IPv4 address (e.g., 192.168.1.0).
2
Select the CIDR network mask (e.g., /24).
3
Instantly view the calculated network ranges, masks, and usable host limits.
Why Use This Tool?
Network Planning
Design subnets for VPCs (AWS, GCP) without overlapping IP ranges.
Firewall Rules
Calculate exact network ranges for configuring firewall access control lists (ACLs).
Understanding Your Results
Usable Hosts
The total number of IP addresses minus two (the network address itself and the broadcast address).
Subnet Mask
A 32-bit number that masks an IP address, dividing it into network address and host address.
Important Notes
- Results are provided for informational purposes only.
- This tool runs entirely in your browser.
- Do not use this tool for malicious scanning or targeting.
Privacy & Security
- No data is sent to our servers. Everything is processed locally.
- We do not collect personal information from tool inputs.
Need reliable hosting for your projects?
Join thousands of developers and businesses using HOSTINGONE's high-performance infrastructure.