AS203391 - WHOIS | ASN.tools

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

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 [email protected]

Request Data Refresh

ASN.tools caches data for performance. If you're the owner of an ASN and need your data refreshed, you can request a manual update.

How to Request a Refresh

Send an email to:

[email protected]

Requirements

Email must be sent from a domain associated with the ASN owner's organization (e.g., [email protected])
Include the ASN number(s) you need refreshed
Brief reason for the refresh request (optional)

All requests are validated to confirm they originate from the ASN owner's organization before processing. This helps prevent abuse and ensures data integrity.

AS203391 WHOIS Data

ASN Registration

Organization

Address

Contacts

Maintainers

Raw WHOIS Data