Subnet Calculator
Calculate IPv4 subnet, mask, broadcast, host range and class from any IP and CIDR prefix.
- Runs in your browser
- No upload on server
- Free, forever
- Paste input
- Run
- Copy result
Network
Network address
192.168.1.0/24
Broadcast
192.168.1.255
Subnet mask
255.255.255.0
Wildcard mask
0.0.0.255
First host
192.168.1.1
Last host
192.168.1.254
Info
Total addresses
256
Usable hosts
254
Class
C
Type
Private (RFC 1918)
Network in binary
11000000.10101000.00000001.00000000
Mask in binary
11111111.11111111.11111111.00000000
How this works — and why it's private
- Type any IPv4 address — for example 10.0.5.42.
- Set the CIDR prefix (0–32) or use a common one like /24.
- See the network, broadcast, mask, host range and class instantly.
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