Threat Intelligence

ASN Lookup

Autonomous System Number information

Look up network owner and ISP information for any IP or ASN. Get allocated IP ranges, organization details, and ASN reputation scores.

ASN Lookup API Documentation

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100K+

ASNs Tracked

4B+

IP Mappings

<100ms

Response Time

Daily

Updates

Key Features

Everything you need to protect your infrastructure and users

Network Owner

Identify the organization that owns a network block.

IP Ranges

See all IP prefixes announced by an ASN.

Geographic Data

Get country and region information for networks.

ASN Reputation

Risk scores based on malicious activity within the ASN.

Peer Analysis

View BGP peering relationships between networks.

Abuse Contacts

Find abuse reporting contacts for network operators.

Use Cases

How security teams use this tool

Threat Attribution

Identify who owns malicious infrastructure.

Network Blocking

Block entire ASNs known for bulletproof hosting.

Geo-blocking

Implement country-level access controls by ASN.

Risk Assessment

Evaluate risk based on network reputation.

Frequently Asked Questions

What is an ASN?

An Autonomous System Number (ASN) is a unique identifier assigned to networks (like ISPs or large organizations) that control a set of IP addresses.

How is ASN data useful for security?

Some ASNs have poor reputations due to hosting malicious content. ASN data helps identify bulletproof hosting and suspicious network ownership.

Can I search by ASN number?

Yes, you can search by ASN number (e.g., AS15169) or by IP address to get the associated ASN.

Do you provide ASN reputation scores?

Yes, we calculate reputation scores for ASNs based on the percentage of malicious IPs within their allocated ranges.

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