Description
Look up Autonomous System Number (ASN) details for an IP address or ASN number. Returns ASN name, organization, IP prefix, registry, and allocation date. Combines GeoLite2 and Team Cymru data for comprehensive results.
Use Cases
- Identify which network owns an IP address
- Research ASN allocation and prefix information
- Network security — trace IP addresses to organizations
- BGP analysis and routing research
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
ip |
string | Yes | IP address or ASN number to look up |
format |
string | No | Response format: json or markdown |