install

Additional install commands

macOS

Homebrewverified · 100%

brew install cidr

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install cidr

MacPorts ports tree · net/cidr/Portfile · source: api.github.com

Linux

Debian aptverified · 92%

sudo apt install cidr

Debian stable package indexes · cidr · source: deb.debian.org

overview

Package summary

CLI to perform various actions on CIDR ranges

Project links

Commands and aliases

cidr

history

Project history and usage

cidr is a small Go command-line tool for inspecting, counting, checking, and subdividing IPv4 and IPv6 CIDR prefixes.

Project history

The GitHub repository was created in September 2022, and the first GitHub release followed that month. The README defines the tool around CIDR explanation, address containment, address counting, overlap checks, and division into smaller networks.

Adoption history

The README documents Homebrew installation, Debian and Ubuntu packages for newer releases, and prebuilt binaries for Linux, macOS, and Windows. The batch input also records MacPorts packaging.

How it is used

Typical commands include explaining a CIDR range, testing whether an address belongs to a range, counting addresses, checking whether two prefixes overlap, and dividing a prefix into distinct networks. The README examples cover both IPv4 and IPv6.

Why package nerds care

cidr is package-nerd useful because it packages common subnet arithmetic into a simple cross-platform CLI, replacing shell snippets or ad hoc web calculators in scripts, package tests, and network automation.

Timeline

2022: Public GitHub repository and v0.1.0 release.
2023: v1.x releases established the CLI line.
2024: v2.0.0 released.
2025: v2.3.0 released.

Related projects

Related tools in this batch include cidr2range, cidrmerge, and IPinfo CLI's IP-range helper binaries.

Sources

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 6 platform targets.
Build metadata lists 1 build dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`cidr`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version2.3.0

manager updated

local dataok

upstreamcurrent

latest detectedv2.3.0

https://github.com/bschaatsbergen/cidr

infoNo package-manager update timestamp was available.low confidence

install metadata

Package metadata

Package key	brew:cidr
Version	2.3.0
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/cidr
Homepage	https://github.com/bschaatsbergen/cidr
Repository	https://github.com/bschaatsbergen/cidr
Upstream docs	https://github.com/bschaatsbergen/cidr#readme
License	MIT
Source archive	https://github.com/bschaatsbergen/cidr/archive/refs/tags/v2.3.0.tar.gz
Build dependencies	go
Bottle	available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	cidr
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	head stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Debian apt95%

cidr 2.2.0-2+b9

Simplifies IPv4/IPv6 CIDR network prefix management

https://github.com/bschaatsbergen/cidr

sudo apt install cidr

Section: net
Architecture: amd64
Source Package: cidr
1 dependencies
normalized package name match
Matched by: Cidr

Debian stable package indexes · deb.debian.org · Debian stable package indexes: cidr from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz

MacPorts95%

cidr

sudo port install cidr

normalized package name match
Matched by: Cidr

MacPorts ports tree · api.github.com · MacPorts ports tree: net/cidr/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/cidr.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install cidr with Homebrew, apt, MacPorts