Retrieve and parse whois data for IPv4 and IPv6 addresses

Chiasmodon is an OSINT tool designed to assist in the process of gathering information about a target domain. Its primary functionality revolves around searching for domain-related data, including domain emails, domain credentials, CIDRs , ASNs , and subdomains, the tool also allows users to search Google Play application ID.

Leverage ASN to look up IP addresses (IPv4 & IPv6) owned by a specific organization for reconnaissance purposes, then run port scanning on it.

Generic ASN.1 library for Python

ASN and IP List in China (Daily Update)

ACCOMPLIST - List Compiler

ASN reconnaissance script

Tool to find common points between ASNs on PeeringDB

Help recon of hostnames from specific ASN or CIDR, thanks to Robtex and BGP.HE

Check whether an IP address or hostname belongs to popular cloud providers

Resolve bulk host file list to IP addresses, ASN, and validate DNS.

whois21 is a simple and easy to use python package that lets you easily query whois information of a domain/IP.

A tool to discover ASN of any host and fetch IP ranges.

ASNPepper - Recon in ASN - Extracting CIDR's - Fast and efficient scanning

Longitudinal IP to ASN mapping

Measuring Internet AS dependency

A tool for checking if IPv4/IPv6 addresses and CIDRs belong to specific netblocks (ASes). This is particularly useful when checking if your netblocks/ASes occur in dumps/leaks (e.g. for Threat Intel purposes).

Asynchronous public DNS auditing tool

API and backend of purplepee.co an open source ASN lookup project. Made for the public.

Pear is a script for gathering info from an ASNumber