Free Developer Tool
CIDR Calculator
Calculate network address, broadcast address, subnet mask, wildcard mask, host range and usable hosts from IPv4 CIDR notation.
Network Address
192.168.1.0
CIDR Notation
192.168.1.0/24
Broadcast Address
192.168.1.255
First Host
192.168.1.1
Last Host
192.168.1.254
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Binary Mask
11111111.11111111.11111111.00000000
Hex Mask
0xFFFFFF00
Total Addresses
256
Usable Hosts
254
IP Class
C
Private Network
Yes
Reverse DNS
15.1.168.192.in-addr.arpa
What is CIDR Calculator?
CIDR notation is commonly used to define IPv4 network ranges. This calculator instantly converts CIDR notation into complete subnet information.
How to use
- Enter an IPv4 address.
- Specify the CIDR prefix length.
- View the calculated subnet information.
Features
- Network address
- Broadcast address
- Subnet mask
- Wildcard mask
- First usable host
- Last usable host
- Usable host count
- Binary representation
Example
Input
192.168.1.25/24
Output
Network: 192.168.1.0 Broadcast: 192.168.1.255 Mask: 255.255.255.0 Hosts: 254
FAQ
What is CIDR?
CIDR is a notation used to describe IP networks using prefix lengths such as /24.
Does this support IPv6?
Currently this calculator focuses on IPv4 CIDR calculations.
Is any data uploaded?
No. Everything is calculated locally inside your browser.
Missing a feature?
If this tool doesn't cover your use case or is missing functionality, please let me know through the Contact page.
New improvements and features are added based on user feedback.