The subnet calculator lets you enter a subnet range (CIDR) and see IP address information about that range You can type your range directly in CIDR notation, or use the optional Mask pull-down:

CIDR Calculator The CIDR Calculator enables CIDR network calculations using IP address, subnet mask, mask bits, maximum required IP addresses and maximum required subnets.

This IP subnet calculator covers both IPv4 and IPv6 protocols, providing information such as IP address, network address, subnet mask, IP range, and more.

Instantly compute and visualize CIDR subnets, IP ranges and masks. Free online tool for accurate network design, planning and IT education.

Free IP address tool to translate IPv4 address range into CIDR (Classless Inter-Domain Routing) format and vice-versa.

Address (Host or Network) Netmask (i.e. 24) Netmask for sub/supernet (optional) / move to:

Apr 15, 2026 · Free CIDR calculator to find subnet masks, IP ranges, network addresses, and host counts. Quickly convert CIDR notation to usable IP information.

Visual Subnet Calculator Enter the network you wish to subnet: Network Address Mask bits / Show columns: Subnet address Netmask Range of addresses Useable IPs Hosts Divide Join

Quickly calculate network ranges with our CIDR Calculator. Convert CIDR notation into IP address ranges, subnet masks, and host counts for efficient network planning.

Free online CIDR calculator for IPv4. Enter any network in CIDR notation to get network address, broadcast, subnet mask, wildcard mask, binary representation and usable host range.