asnmap
Operator: ProjectDiscovery, Inc., United States
A local tool and Go library for finding network ranges from an ASN, IP address, domain or organisation name.
Technical Infrastructure
Product
asnmap
Availability and source date
Active
As of: 16 October 2026.
No functionality test has been performed.
Use in OSINT research
Finds ASNs and IP network ranges associated with a starting value.
Queries
| Input | Result | Result type |
|---|---|---|
| ASN | IP ranges associated with the autonomous network in CIDR notation. | Retrieved |
| IP address | The associated ASN and its network ranges. | Retrieved |
| Domain / website | ASNs identified through the domain and their associated network ranges. | Retrieved |
| Company / organisation name | ASNs and network ranges found for the organisation. | Retrieved |
Features
- Query ASNs, IP addresses, domains and organisation names individually or as a list.
- Output IPv4 and IPv6 network ranges in CIDR notation.
- Show the ASN number, network name and country in structured results.
- Save results as text, JSON or CSV.
- Accept input from files and other command-line programs.
- Integrate research functions into your own programs as a Go library.
Categories
- Technical Infrastructure
- IP & ASN
Coverage
Dataset
Uses the ProjectDiscovery ASNMap API. The README also refers to the free IPtoASN database.
Access
Installation and deployment
Locally installable
A command-line program and Go library for local installation. Network data comes from the external ASNMap API.
Requirements
A local installation or precompiled binary. Queries require a ProjectDiscovery Cloud account and API key. Building from source requires Go.
Export
Text, JSON and CSV. File output, standard input and standard output support further processing in other programs.
Provider
ProjectDiscovery, Inc.
Country of establishment
United States
Interfaces
API
Available. The command line uses the ASNMap API with a ProjectDiscovery Cloud token. The functionality is also available as a Go library.
MCP
Not documented. Not documented in the reviewed tool documentation.
AI agents
Not documented. No dedicated AI agent integration is documented in the reviewed tool documentation.
Maintenance
Licence
MIT
Latest activity
Commit 05/2026
Stars
approx. 1,100 (as of 16 October 2026)
Legal note
Limitations
- The local installation still requires the external ASNMap API and an API key.
- The free API query quota is not specified in the reviewed tool documentation.
Guides and practical reports
Official · README: set up and query ASNMap
ProjectDiscovery, Inc. · EN
Explains installation, API keys, alternative inputs and output formats.