NETWORK, DATA, AND DIGITAL MEDIA
Calculate an IPv4 network address, subnet mask, broadcast address, total address count, and traditional usable-host count from CIDR notation.
Your result
Enter your values and select Calculate. Your result stays on this device.
The prefix creates a 32-bit network mask; bitwise AND yields the network and the inverted host mask yields the broadcast address.
Uses IPv4 and CIDR only. Host usability for /31, /32, point-to-point links, cloud networks, reserved ranges, and provider policies can differ.
This IPv4 subnet calculator targets the common U.S. IT search for a quick network-range check. It keeps the input address and CIDR prefix separate and returns the core dotted-decimal values together.
Use case
Enter a dotted-decimal IPv4 address and prefix to calculate the network range using visible CIDR rules before verifying a production plan.
Check an IPv4 CIDR network, mask, broadcast address, and address count.
Build a reliable scenario
IPv4 Subnet Calculator helps you check a specific technology & networking question with figures that apply to you. Calculate an IPv4 network address, subnet mask, broadcast address, total address count, and traditional usable-host count from CIDR notation. Enter a dotted-decimal IPv4 address and prefix to calculate the network range using visible CIDR rules before verifying a production plan. Check an IPv4 CIDR network, mask, broadcast address, and address count. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
Prepare IPv4 address and CIDR prefix. Enter a valid dotted-decimal IPv4 address. Enter a CIDR prefix from 0 through 32. Calculate the network, mask, broadcast, and address counts. Verify the result against the real platform before changing a production network. Keep units, dates, currency, and time periods consistent.
The stated method is: The prefix creates a 32-bit network mask; bitwise AND yields the network and the inverted host mask yields the broadcast address. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
Uses IPv4 and CIDR only. Host usability for /31, /32, point-to-point links, cloud networks, reserved ranges, and provider policies can differ. Verify production network plans against device, provider, security, and address-management requirements.
Source and update
Last reviewed: 2026-08-22
IETF RFC 4632 — Classless Inter-domain RoutingIt means the first 24 bits are the network prefix, corresponding to the mask 255.255.255.0.
Traditional subnets reserve the network and broadcast addresses, although /31, /32, and platform-specific rules differ.
No. This calculator is limited to IPv4 CIDR.
Keep exploring
Clear calculation guide
This free IPv4 Subnet Calculator keeps the values and the calculation method visible instead of returning an unexplained number. Calculate an IPv4 network address, subnet mask, broadcast address, total address count, and traditional usable-host count from CIDR notation. Use it to check a scenario with the figures that apply to you.
Start by checking units, dates, decimal places, and the option you selected. This IPv4 subnet calculator targets the common U.S. IT search for a quick network-range check. It keeps the input address and CIDR prefix separate and returns the core dotted-decimal values together. The stated mathematical method is: The prefix creates a 32-bit network mask; bitwise AND yields the network and the inverted host mask yields the broadcast address.
Change one assumption at a time to understand what moves the result, then keep any final record or institution-specific rule separate from the arithmetic. Uses IPv4 and CIDR only. Host usability for /31, /32, point-to-point links, cloud networks, reserved ranges, and provider policies can differ. Hesaplayın is a clear, browser-based calculator for checking the maths behind your decision.