IPGeolocation.io ASN Lookup API
API endpoint for retrieving Autonomous System Number (ASN) informationassociated with IPv4 addresses, IPv6 addresses, or specific ASN numbers.The response includes ASN metadata such as the ASN number, organizationname, country of registration, ASN type, domain, allocation details,routing statistics, and the Regional Internet Registry (RIR) responsiblefor the allocation.Additional routing intelligence such as peers, upstreams, downstreams,announced routes, and raw WHOIS registry data can also be retrievedusing the `include` parameter.This information helps analyze internet routing, identify networkoperators, and understand how Autonomous Systems interconnectacross the internet.
IPGeolocation.io ASN Lookup API is one of 7 APIs that IPGeolocation.io publishes on the 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.
This API exposes 1 operation across 1 path, and defines 4 schemas. It is described by OpenAPI 3.2.0, at version 3.0.
Requests are made against a single base URL, https://api.ipgeolocation.io.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 1
IPGeolocation.io ASN Lookup API declares
1 security scheme
for authenticating requests.
An API key is passed in the query as apiKey (ApiKeyAuth).
By default, every request must be authenticated.
ApiKeyAuth— API key passed as the apiKey query parameter. Get yours from the [IPGeolocation dashboard](https://app.ipgeolocation.io/). For client-side usage, consider usin…
Paths & Operations 1
Across 1 path, the API surfaces 1 operation — 1 GET. Each is listed below with its method, path, parameters, and response codes.
API endpoint for retrieving Autonomous System Number (ASN) information associated with IPv4 addresses, IPv6 addresses, or specific ASN numbers.
Schemas 4
The contract defines 4 schemas that model the data the API accepts and returns. The most detailed are ASN (16 properties), ASNConnection (3 properties), ASNLookupResponse (2 properties), ErrorResponse (1 property). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from IPGeolocation.io 6
Other APIs IPGeolocation.io publishes across the network.
This is an independent, third-party profile of IPGeolocation.io ASN Lookup API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
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