Free Developer Tool
Subnet Calculator
Calculate subnet masks, broadcast addresses, network IDs, host ranges and usable hosts for IPv4 networks.
CIDR
192.168.1.0/24
Network Address
192.168.1.0
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 Subnet Calculator?
Subnetting divides large networks into smaller logical segments. This calculator helps determine subnet information quickly.
How to use
- Enter an IPv4 address.
- Enter a subnet mask or CIDR prefix.
- View calculated subnet information.
Features
- Subnet mask conversion
- CIDR conversion
- Network address
- Broadcast address
- Host range
- Host count
- Binary subnet information
Example
Input
IP: 10.0.0.15 Mask: 255.255.255.0
Output
Network: 10.0.0.0 Broadcast: 10.0.0.255 Hosts: 254
FAQ
Can I use CIDR notation?
Yes. Both subnet masks and CIDR prefixes are supported.
Is IPv6 supported?
Currently only IPv4 subnet calculations are available.
Does this require internet?
No. All calculations happen locally.
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.