# IPGeolocation.io ASN Lookup API

**Canonical:** https://apis.io/apis/ipgeolocation/ipgeolocation-asn-lookup-api/  
**Provider:** IPGeolocation.io — https://apis.io/providers/ipgeolocation/  
**Base URL:** https://api.ipgeolocation.io  
**Documentation:** https://ipgeolocation.io/ip-location-api.html

IPGeolocation.io ASN Lookup API is one of 7 APIs that [IPGeolocation.io](https://apis.io/providers/ipgeolocation/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include ASN Lookup. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

API endpoint for retrieving Autonomous System Number (ASN) information associated with IPv4 addresses, IPv6 addresses, or specific ASN numbers. The response includes ASN metadata such as the ASN number, organization name, country of registration, ASN type, domain, allocation details, routing statistics, and the Regional Internet Registry (RIR) responsible for the allocation. Additional routing intelligence such as peers, upstreams, downstreams, announced routes, and raw WHOIS registry data can also be retrieved using the `include` parameter. This information helps analyze internet routing, identify network operators, and understand how Autonomous Systems interconnect across the internet.

## Machine-readable artifacts (23)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/ipgeolocation/refs/heads/main/openapi/ipgeolocation-asn-lookup-api-openapi.yml
- **Documentation** — https://ipgeolocation.io/documentation/ip-geolocation-api.html
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-php
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-python-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-java-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-javascript-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-typescript-sdk
- **SDKs** — https://www.npmjs.com/package/ip-geolocation-api-javascript-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-ruby-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-go-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-dotnet-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-kotlin-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-swift-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-rust-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-cpp-sdk
- **SDKs** — https://github.com/IPGeolocation/ip-geolocation-api-jquery-sdk
- **Documentation** — https://ipgeolocation.io/documentation/ip-security-api.html
- **Documentation** — https://ipgeolocation.io/documentation/asn-api.html
- **Documentation** — https://ipgeolocation.io/documentation/abuse-contact-api.html
- **Documentation** — https://ipgeolocation.io/documentation/timezone-api.html
- **Documentation** — https://ipgeolocation.io/documentation/astronomy-api.html
- **Documentation** — https://ipgeolocation.io/documentation/user-agent-api.html
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/ipgeolocation/refs/heads/main/apis.yml

## Other IPGeolocation.io APIs (6)

- [IPGeolocation.io Astronomy API](https://apis.io/apis/ipgeolocation/ipgeolocation-astronomy-api/)
- [IPGeolocation.io IP Abuse Contact API](https://apis.io/apis/ipgeolocation/ipgeolocation-ip-abuse-contact-api/)
- [IPGeolocation.io IP Geolocation API](https://apis.io/apis/ipgeolocation/ipgeolocation-ip-geolocation-api/)
- [IPGeolocation.io IP Security API](https://apis.io/apis/ipgeolocation/ipgeolocation-ip-security-api/)
- [IPGeolocation.io Timezone API](https://apis.io/apis/ipgeolocation/ipgeolocation-timezone-api/)
- [IPGeolocation.io User Agent API](https://apis.io/apis/ipgeolocation/ipgeolocation-user-agent-api/)

## Tags

ASN Lookup

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/ipgeolocation/ipgeolocation-asn-lookup-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/ipgeolocation/.