IPv4 network calculators
Tools for planning IPv4 addressing and checking subnets.
- Subnet CalculatorEnter an IP address and a CIDR prefix to get every parameter of the subnet, from the network address to the host count.
- IP CalculatorEnter an IPv4 address and prefix to see the network it belongs to and what kind of address it is.
- CIDR CalculatorDecodes CIDR notation such as 10.0.0.0/8: the range it covers, its mask and how many addresses it contains.
- Subnet Mask CalculatorEnter an IP address and a mask in either form — 255.255.255.0 or /24. You get every equivalent notation of the mask and the network details.
- IP Range CalculatorShows where an IPv4 block starts and ends, plus the range you can assign to devices.