GitHub: https://github.com/projectdiscovery/asnmap

Features

ASN to CIDR Lookup
ORG to CIDR Lookup
DNS to CIDR Lookup
IP to CIDR Lookup
ASN/DNS/IP/ORG input
JSON/CSV/TEXT output
STD IN/OUT support

Installation

asnmap requires Go 1.21 to install successfully. To install, just run the below command or download pre-compiled binary from release page.

go install github.com/projectdiscovery/asnmap/cmd/asnmap@latest

Usage

asnmap -h

This will display help for the tool. Here are all the flag it supports.

Usage:
./asnmap [flags]

Flags:
INPUT:
-a, -asn string[] target asn to lookup, example: -a AS5650
-i, -ip string[] target ip to lookup, example: -i 100.19.12.21, -i 2a10:ad40::
-d, -domain string[] target domain to lookup, example: -d google.com, -d facebook.com
-org string[] target organization to lookup, example: -org GOOGLE
-f, -file string[] targets to lookup from file

CONFIGURATIONS:
-config string path to the asnmap configuration file
-r, -resolvers string[] list of resolvers to use

UPDATE:
-up, -update update asnmap to latest version
-duc, -disable-update-check disable automatic asnmap update check

OUTPUT:
-o, -output string file to write output to
-j, -json display json format output
-c, -csv display csv format output
-v6 display ipv6 cidr ranges in cli output
-v, -verbose display verbose output
-silent display silent output
-version show version of the project

Configuring ASNMap CLI

ASNMap CLI is built on top of the ASNMap API that requires API Token from ProjectDiscovery Cloud Platform that can be configured using environment variable or using interactive -auth option as shown below.

Using environment variable

export PDCP_API_KEY=*************

Using auth option

asnmap -auth

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/ __ |_\ \/ / ' \/ _ / _ \
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/_/

projectdiscovery.io

[INF] Get your free api key by signing up at https://cloud.projectdiscovery.io
[*] Enter PDCP API Key (exit to abort): *************
[INF] Successfully logged in as (@user)

Running asnmap

asnmap support multiple inputs including ASN, IP, DNS and ORG name to query ASN/CIDR information.

Input	ASN	DNS	IP	ORG
Example	`AS14421`	`example.com`	`93.184.216.34`	`GOOGLE`

Input can be provided either using specific options or STDIN which accepts all the supported formats. Single, multiple (comma-separated) and file input is supported for all the options.

echo GOOGLE | ./asnmap -silent

Example input for asnmap:

asnmap -a AS45596 -silent
asnmap -i 100.19.12.21 -silent
asnmap -d hackerone.com -silent
asnmap -org GOOGLE -silent

Default Run

asnmap by default returns the CIDR range for given input.

echo GOOGLE | ./asnmap

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/_/ v0.0.1
projectdiscovery.io

Use with caution. You are responsible for your actions
Developers assume no liability and are not responsible for any misuse or damage.

8.8.4.0/24
8.8.8.0/24
8.35.200.0/21
34.3.3.0/24
34.4.4.0/24
34.96.0.0/20
34.96.32.0/19
34.96.64.0/18
34.98.64.0/18
34.98.136.0/21
34.98.144.0/21

JSON Output

asnmap by default displays CIDR range, and all the information is always available in JSON format, for automation and post processing using -json output is most convenient option to use.

echo hackerone.com | ./asnmap -json -silent | jq{
"timestamp": "2022-09-19 12:14:33.267339314 +0530 IST",
"input": "hackerone.com",
"as_number": "AS13335",
"as_name": "CLOUDFLARENET",
"as_country": "US",
"as_range": [
"104.16.0.0/14",
"104.20.0.0/16",
"104.21.0.0/17"
]
}
{
"timestamp": "2022-09-19 12:14:33.457401266 +0530 IST",
"input": "hackerone.com",
"as_number": "AS13335",
"as_name": "CLOUDFLARENET",
"as_country": "US",
"as_range": [
"2606:4700:8390::/44"
]
}

CSV Output

asnmap also support csv format output which has all the information just like JSON output

Using with other PD projects

Output of asnmap can be directly piped into other projects in workflow accepting stdin as input, for example:

echo AS54115 | asnmap | tlsx
echo AS54115 | asnmap | dnsx -ptr
echo AS54115 | asnmap | naabu -p 443
echo AS54115 | asnmap | naabu -p 443 | httpx
echo AS54115 | asnmap | naabu -p 443 | httpx | nuclei -id tech-detect

Use asnmap as a library

Examples of using asnmap from Go code are provided in the examples folder.

Acknowledgements

Frank Denis for maintaining free IPtoASN database.

ASNmap: Go CLI and Library for quickly mapping organization network ranges using ASN information

Features

Installation

Usage