ASN.tools beta

API Reference

All endpoints return JSON data. Base URL: https://asn.tools/api

GET ASN Lookup

Get detailed information about an Autonomous System Number

curl https://asn.tools/api/asn/13335

GET IP Lookup

Get origin ASN, prefix, and validation status for an IP address

curl https://asn.tools/api/ip/1.1.1.1

GET Prefix Lookup

Get origin ASN and IRR/RPKI validation for a prefix

curl https://asn.tools/api/prefix/1.1.1.0/24

GET Cache Statistics

Get cache hit/miss statistics (always available)

curl https://asn.tools/api/cache/stats

GET Health Check

Check API status and version

curl https://asn.tools/health

Loading WHOIS for AS6939...

AS6939 WHOIS

AS6939 WHOIS Data

Overview Prefixes Peers IX Graph Whois

ASN Registration

Organization

Address

Contacts

Maintainers

Raw WHOIS Data

Loading...

Data from cache •

Made with by DigitalFyre

Built on Fly.io in Python with the help of Team Cymru • RIPEstat • PeeringDB • Routinator

About ASN.tools

ASN.tools is a fast, modern ASN, IP, and Prefix lookup tool built for network engineers and security professionals.

We aggregate data from multiple authoritative sources including Team Cymru, RIPEstat, PeeringDB, and RPKI validators to provide comprehensive network intelligence.

Features

Real-time ASN & IP lookups
IRR & RPKI validation
Interactive peer graphs
IX presence data
JSON API access

Privacy Policy

ASN.tools respects your privacy. Here's what you need to know:

Data Collection

We do not collect personal information. Search queries are cached temporarily to improve performance but are not linked to individual users.

Cookies

We do not use tracking cookies. Only essential session cookies may be used for functionality.

Third-Party Services

We use data from Team Cymru, RIPEstat, and PeeringDB. Please refer to their privacy policies for data they collect.

Contact

For privacy concerns, contact us at privacy@digitalfyre.com