IPNetwork calculator
IPv4 Subnet Calculator
Enter an IPv4 address and CIDR prefix to inspect the corresponding subnet range.
Free foreverPrivate inputsInstant results
Live calculator
Browser-basedEnter your values
Network range192.168.1.0/24
254 usable hosts
- Subnet mask
- 255.255.255.0
- First host
- 192.168.1.1
- Last host
- 192.168.1.254
- Broadcast
- 192.168.1.255
- Total addresses
- 256
Nothing is uploaded. Results update locally as you type.
How it works
Transparent math, not a mystery result.
NetCalcKit uses standard decimal network units unless the page explicitly says otherwise. The calculator updates in your browser and labels ideal estimates separately from real-world conditions.
What this tool answers
Inspect an IPv4 address and CIDR prefix to find the network boundary, subnet mask, usable host range, broadcast address, and address count.
IPv4 subnet calculatorCIDR calculator with host rangesubnet mask and broadcast calculator
Common questions
Good to know.
How are /31 and /32 handled?+
/31 is treated as a two-address point-to-point network, while /32 represents one host address.
What is CIDR notation?+
The number after the slash shows how many leading bits form the network prefix.
Understand the result