ASN Lookup API Documentation

Access ASN lookup data programmatically through our RESTful API. Get detailed information about ASNs, IP addresses, and organizations.

Version: 1.0.0 Last Updated: April 18, 2022

Get Started

ASNLookup API provides an easy, fast and reliable programmatic way to quickly look up information about ASN, organization, CIDR, or registered IP addresses (IPv4 and IPv6) among other relevant data in a simple and effective manner.

To use this API, you need an API key. Please sign up to get your own API key.
If you run into an issue, kindly reach out to us: [email protected]

Get ASN Data

Endpoint

https://asn-lookup.p.rapidapi.com/api

Only one query parameter is allowed in an API call.
HTTP response is returned in JSON format.

Query Parameters

Field	Type	Description
asn	String	AS number (e.g: AS32934 or 32934)
orgname	String	Organization name (e.g: Facebook)
cidr	String	IPv4/IPv6 CIDR (e.g: 66.220.144.0/20 or 2620:0:1c00::/40)
ip	String	IPv4/IPv6 address (e.g: 66.220.144.0 or 2400:6180:0:d1::79b:1)

Example Request

                                        $ curl -i -s -k -X 'GET' 'https://asn-lookup.p.rapidapi.com/api?asn=AS13414' \
-H 'Host: asn-lookup.p.rapidapi.com' \
-H 'X-Rapidapi-Host: asn-lookup.p.rapidapi.com' \
-H 'X-Rapidapi-Key: YOUR_API_KEY'

Response Example

                                        [
  {
    "asnHandle": 13414,
    "asnName": "TWITTER",
    "orgID": "TWITT-ARIN",
    "orgName": "TWITTER",
    "orgCountry": "US",
    "ipv4_prefix": [
      "64.63.0.0/18",
      "69.195.160.0/24",
      "69.195.162.0/23",
      "69.195.164.0/23",
      "69.195.166.0/24",
      "69.195.168.0/23",
      "69.195.171.0/24",
      "69.195.172.0/24",
      "69.195.174.0/23",
      "69.195.176.0/21",
      "69.195.184.0/22"
    ],
    "ipv6_prefix": [
      "2400:6680:f000::/36",
      "2606:1f80:f000::/36",
      "2a04:9d40:f000::/36"
    ]
  }
]

Errors

The ASNLookup API uses the following error codes:

Error Code	Meaning
404	The resource was not found.
403	GET parameter is invalid.
403	Only one query parameter is allowed in a GET call.
403	Parameter value is not valid.
403	Invalid API key - You're not subscribed to this API.