# Install asn with Homebrew, apk, apt, Nix

Organization lookup and server tool (ASN / IPv4 / IPv6 / Prefix / AS Path). Version 0.81.0 via Homebrew; verified from local package data. Also installable with debian: sudo apt install asn.

## Install

```sh
sudo av install brew:asn
```

Additional install commands:

### macOS

- Homebrew (100%):

```sh
brew install asn
```

  Evidence: local Homebrew formula metadata

### Linux

- apk (92%):

```sh
sudo apk add asn
```

  Evidence: Alpine Linux edge package indexes: asn from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz

- Debian apt (92%):

```sh
sudo apt install asn
```

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

- Nix (92%):

```sh
nix profile install nixpkgs#asn
```

  Evidence: nixpkgs package indexes: pkgs/by-name/as/asn/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

## Package facts

- **Package key:** brew:asn
- **Package manager:** Homebrew
- **Version:** 0.81.0
- **Source summary:** Organization lookup and server tool (ASN / IPv4 / IPv6 / Prefix / AS Path)
- **Homepage:** <https://github.com/nitefood/asn>
- **Repository:** <https://github.com/nitefood/asn>
- **Generated:** 2026-08-03T19:37:03+00:00

## Executables

- asn (alias)

## Install behavior

- Bottle: not available

## Freshness

- Page generated: 2026-08-03
- Package-manager version: 0.81.0
## Project history and usage

asn is a Bash-based network lookup, recon, and traceroute server tool centered on autonomous systems, prefixes, RPKI validity, BGP statistics, geolocation, reputation, and IP/ASN investigation workflows.

### Project history

The nitefood/asn repository was created in July 2020. The README describes a single command-line tool that can also run as a web traceroute server and as a JSON-producing lookup API endpoint.

The project grew beyond simple ASN lookup into a collector of network intelligence APIs and command-line workflows. Its README lists Team Cymru, Prefix Whois, PeeringDB, CAIDA ASRank, RIPEStat, RIPE IPmap, Shodan, Cloudflare Radar, GreyNoise, NVD, IPQualityScore, ipinfo.io, and other data providers as supported inputs.

### Adoption history

asn has unusually broad packaging for a shell network tool. The README displays OS support for Debian, Ubuntu, Kali, CentOS, Red Hat, Rocky Linux, Fedora, Arch, Manjaro, Alpine, openSUSE, FreeBSD, Nix, macOS, Windows environments, and Raspberry Pi, and the input package facts list apk, Homebrew, Debian, Nix, and Ubuntu packages.

GitHub metadata shows roughly two thousand stars and active releases through 2026. Homebrew analytics show continuing installs, while the README's Repology badge points at multi-repository packaging status.

### How it is used

The common workflow is to run `asn` against an IP address, hostname, prefix, AS number, URL, or organization name and inspect enriched network output. The tool can do AS path tracing with mtr, RPKI checks, organization searches, Shodan recon, country CIDR mapping, bulk geolocation, and JSON output for pipelines.

Configuration is deliberately Unix-like: defaults can be overridden with `$HOME/.asnrc`, and optional API tokens are read from `$HOME/.asn/` for user mode or `/etc/asn/` for server mode. Docker and Google Cloud Shell workflows are documented for users who do not want a local install.

### Why package nerds care

asn is significant because it packages a messy incident-response habit, asking several network-intelligence services about an address or ASN, into a scriptable CLI. For package maintainers, it is also an instructive case: a Bash tool with many external command and API integrations, distro packages, container usage, and optional credential files.

It occupies the same practical shelf as whois, dig, mtr, bgp.tools shortcuts, and OSINT helper scripts, but makes the package-manager version matter because release updates can add or repair upstream data-provider integrations.

### Timeline

- 2020: GitHub repository created.
- 2024: v0.76 and v0.78 releases published.
- 2025: v0.79 and v0.80 releases published.
- 2026: v0.81.0 published and listed by Homebrew as the stable version.

### Related projects

- The README documents integrations with mtr, Team Cymru IP to ASN mapping, Prefix Whois, PeeringDB, CAIDA ASRank, RIPEStat, Cloudflare Radar, Shodan, GreyNoise, ipinfo.io, and other network-data services.

### Sources

- <https://api.github.com/repos/nitefood/asn>
- <https://api.github.com/repos/nitefood/asn/releases>
- <https://formulae.brew.sh/api/formula/asn.json>
- <https://github.com/nitefood/asn#readme>
- source_facts.package-manager


## Security Notes

broad file, network, media, or database tool signal.

- **Geiger risk:** blue / medium
- broad file, network, media, or database tool signal


## Configuration and credential file locations

These source-backed paths show where this package keeps local settings or durable credentials. Automic Vault can use them as review targets for secret scanning, migration, and command approval.


## Configuration files

- Unix: ~/.asnrc

## Credential files

- Unix: ~/.asn/ipinfo_token, /etc/asn/ipinfo_token, ~/.asn/iqs_token, /etc/asn/iqs_token, ~/.asn/cloudflare_token, /etc/asn/cloudflare_token
## Other Package-Manager Records

- Debian apt - asn - 0.78.0-1: normalized package name match | Debian stable package indexes: asn from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | network OSINT CLI ASN, RPKI, BGP, Geo, Recon, Trace | https://github.com/nitefood/asn/
- Nix - asn: normalized package name match | nixpkgs package indexes: pkgs/by-name/as/asn/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1
- Ubuntu apt - asn - 0.75.3-1.1: normalized package name match | Ubuntu 24.04 LTS package indexes: asn from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | network OSINT CLI ASN, RPKI, BGP, Geo, Recon, Trace | https://github.com/nitefood/asn/
- apk - asn - 0.81.0-r0: normalized package name match | Alpine Linux edge package indexes: asn from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | ASN Lookup Tool and Traceroute Server | https://github.com/nitefood/asn/


## Combined YAML source

View the package source record on GitHub. [combined/asn.yml](https://github.com/mxcl/pkgdb/blob/main/combined/asn.yml)


## Sources

- pkg.so package database
- Geiger risk classifier
- curated configuration and credential file locations
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph