IPGeolocation.io · JSON Structure

Asn Asn Structure

ASN information describing the Autonomous System responsible for routing the queried IP address or the specified ASN. Costs 1 credit.

Type: object Properties: 16
GeocodingIP GeolocationIP IntelligenceIP SecurityASN LookupAbuse ContactTimezoneAstronomyUser AgentThreat IntelligencePublic APIs

ASN is a JSON Structure definition published by IPGeolocation.io, describing 16 properties. It conforms to the https://json-structure.org/meta/core/v0/# meta-schema.

Properties

as_number organization country asn_name type domain date_allocated rir allocation_status num_of_ipv4_routes num_of_ipv6_routes peers downstreams upstreams routes whois_response

Meta-schema: https://json-structure.org/meta/core/v0/#

JSON Structure

Raw ↑
{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/ipgeolocation/refs/heads/main/json-structure/asn-asn-structure.json",
  "name": "ASN",
  "description": "ASN information describing the Autonomous System responsible for routing\nthe queried IP address or the specified ASN. Costs 1 credit.\n",
  "type": "object",
  "properties": {
    "as_number": {
      "type": "string",
      "description": "Complete Autonomous System Number that was looked up.",
      "example": "AS24940"
    },
    "organization": {
      "type": "string",
      "description": "Name of the organization to which the ASN is assigned.",
      "example": "Hetzner Online GmbH"
    },
    "country": {
      "type": "string",
      "description": "ISO 3166-1 alpha-2 country code where the ASN is registered.",
      "example": "DE"
    },
    "asn_name": {
      "type": "string",
      "description": "Official ASN handle.",
      "example": "HETZNER-AS"
    },
    "type": {
      "type": "string",
      "description": "ASN category. Possible values include `ISP`, `HOSTING`, `BUSINESS`,\n`EDUCATION`, or `GOVERNMENT` when available.\n",
      "example": "HOSTING"
    },
    "domain": {
      "type": "string",
      "description": "Domain associated with the ASN.",
      "example": "hetzner.com"
    },
    "date_allocated": {
      "type": "string",
      "description": "Date when the ASN was originally allocated.",
      "example": "2002-06-03"
    },
    "rir": {
      "type": "string",
      "description": "Regional Internet Registry that allocated the ASN.\nExamples include `RIPE`, `ARIN`, `APNIC`, `LACNIC`, `AFRINIC`, etc.\n",
      "example": "RIPE"
    },
    "allocation_status": {
      "type": "string",
      "description": "Current allocation status of the ASN.",
      "example": "ASSIGNED"
    },
    "num_of_ipv4_routes": {
      "type": "string",
      "description": "Number of IPv4 prefixes announced by this ASN.",
      "example": "84"
    },
    "num_of_ipv6_routes": {
      "type": "string",
      "description": "Number of IPv6 prefixes announced by this ASN.",
      "example": "6"
    },
    "peers": {
      "type": "array",
      "description": "Directly connected peer ASNs.",
      "items": {
        "type": "object",
        "description": "Represents a connected Autonomous System such as a peer,\nupstream provider, or downstream customer.\n",
        "properties": {
          "as_number": {
            "type": "string",
            "description": "Autonomous System Number of the connected network.",
            "example": "AS3356"
          },
          "description": {
            "type": "string",
            "description": "Name or description of the connected network operator.",
            "example": "Level 3 Parent, LLC"
          },
          "country": {
            "type": "string",
            "description": "Country code of the connected ASN.",
            "example": "US"
          }
        }
      }
    },
    "downstreams": {
      "type": "array",
      "description": "Downstream (customer) ASNs connected to this ASN.",
      "items": {
        "type": "object",
        "description": "Represents a connected Autonomous System such as a peer,\nupstream provider, or downstream customer.\n",
        "properties": {
          "as_number": {
            "type": "string",
            "description": "Autonomous System Number of the connected network.",
            "example": "AS3356"
          },
          "description": {
            "type": "string",
            "description": "Name or description of the connected network operator.",
            "example": "Level 3 Parent, LLC"
          },
          "country": {
            "type": "string",
            "description": "Country code of the connected ASN.",
            "example": "US"
          }
        }
      }
    },
    "upstreams": {
      "type": "array",
      "description": "Upstream provider ASNs used for internet connectivity.",
      "items": {
        "type": "object",
        "description": "Represents a connected Autonomous System such as a peer,\nupstream provider, or downstream customer.\n",
        "properties": {
          "as_number": {
            "type": "string",
            "description": "Autonomous System Number of the connected network.",
            "example": "AS3356"
          },
          "description": {
            "type": "string",
            "description": "Name or description of the connected network operator.",
            "example": "Level 3 Parent, LLC"
          },
          "country": {
            "type": "string",
            "description": "Country code of the connected ASN.",
            "example": "US"
          }
        }
      }
    },
    "routes": {
      "type": "array",
      "description": "IPv4 and IPv6 prefixes announced by this ASN.",
      "items": {
        "type": "string"
      },
      "examples": [
        "192.76.177.0/24",
        "2607:f600::/32"
      ]
    },
    "whois_response": {
      "type": "string",
      "description": "Raw WHOIS registry record text returned for the ASN.",
      "example": "ASNumber: 24940\nOrgName: Hetzner Online GmbH\nCountry: DE"
    }
  }
}

Work with this as data

Every JSON Structure here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for json structure

4 MCP tools reach this
  • find_json_structuresBrowse and filter every JSON Structure in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This JSON Structure
curl "https://apis.io/api/v1/json-structures/asn-asn-structure"
All json structure
curl "https://apis.io/api/v1/json-structures?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.