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NETWORK DESK
Given an IPv4 address and a CIDR prefix length, compute the network address, broadcast address, first and last host, total host count, and the wildcard mask.
WHAT THIS DOES
Runs entirely in your browser.
/tools/cidr-calculatorcidr-calcv4.0.0LOCAL · LOCAL RUNIMPLEMENTED — This workbench is functional in the current release.Presets for this workbench
No preset yet. A preset stores the values in this form — never the result — and only for workbenches that run entirely in your browser.
Collections
Saved on this device only. Turn on sync to carry them to another device.
BATCH / ONE VALUE PER LINE
Up to 200 lines, one at a time, in this browser. Each line takes the place of address and everything else stays as you set it. Nothing is uploaded, and the row limit is not exceeded silently.
METHOD / LOCAL RUN
Mask = (0xFFFFFFFF << (32 − prefix)) >>> 0. Network = address & mask. Broadcast = network | ~mask.
Boundary: Single IPv4 block. Does not handle supernetting, IPv6, or VLSM.
The calculation or transformation runs in your browser using the values entered above. No input is sent to UtilityForge for this tool.
EXAMPLES / LOCAL RUN FIXTURES
FAQ
No. The CIDR calculator runs entirely in your browser.
The workbench states the exact method behind every result — the formula or procedure this page runs — so you can verify the computation instead of trusting a black box.
No. This workbench runs in the page: IPv4 address, CIDR prefix (0–32) are read by the code your browser already downloaded, and UtilityForge receives neither the values nor the result.
Single IPv4 block. Does not handle supernetting, IPv6, or VLSM.
RELATED TOOLS
LOCAL — Runs entirely in your browser.
COMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Local bit math; no DNS or network contact.