IP Calculator
Analyze IPv4 ranges, subnet masks, and available host counts.
Subnet mask
255.255.255.0
Network address
192.168.1.0
Broadcast address
192.168.1.255
First usable IP
192.168.1.1
Last usable IP
192.168.1.254
Available hosts
254
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How to use the IP calculator
- Enter a valid IPv4 address in the main field (for example 192.168.1.0).
- Adjust the CIDR prefix to define the desired subnet mask.
- Instantly view network, broadcast, usable host range, and available address count.
What is it for?
The IP calculator analyzes IPv4 ranges, masks, and CIDR without spreadsheets or terminal commands. Sysadmins, networking students, and technicians use it to plan segmentation, VLANs, and address assignment in offices or labs.
By entering IP and prefix you get network, broadcast, first and last usable IP, and total hosts—key information when designing subnets, firewalls, or documenting infrastructure.
It is a free IP calculator in the browser, ideal for verifying settings before applying them on routers, switches, or cloud environments where every address counts.
Frequently asked questions
Does the IP calculator support IPv6?
This tool focuses on IPv4. For IPv6 networks you would need a calculator specific to that protocol.
What is the CIDR prefix?
CIDR shows how many bits belong to the network (for example /24). A larger prefix means fewer available hosts in the subnet.
Who is the IP calculator for?
System administrators, backend developers, IT students, and anyone who needs to calculate subnets without installing extra tools.
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