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ASN API Developer Resource

Available in: Basic, Business, and Enterprise

ASN API allows you to programmatically access details about an ASN, such as the assigned prefixes, related domain, and more. The ASN API is available at /ASXX/json.

curl ipinfo.io/AS7922/json?token=$TOKEN

{
  "asn": "AS7922",
  "name": "Comcast Cable Communications, LLC",
  "country": "US",
  "allocated": "1997-02-14",
  "registry": "arin",
  "domain": "comcast.com",
  "num_ips": 71224576,
  "type": "isp",
  "prefixes": [
    {
      "netblock": "104.69.216.0/22",
      "id": "AKAMAI",
      "name": "Akamai Technologies, Inc.",
      "country": "US"
    },
    {
      "netblock": "104.69.220.0/23",
      "id": "AKAMAI",
      "name": "Akamai Technologies, Inc.",
      "country": "US"
    }
  ],
  "prefixes6": [
    {
      "netblock": "2601::/20",
      "id": "COMCAST6NET",
      "name": "Comcast Cable Communications, LLC",
      "country": "US"
    },
    {
      "netblock": "2603:2000::/20",
      "id": "COMCAST6NET",
      "name": "Comcast Cable Communications, LLC",
      "country": "US"
    },
    {
      "netblock": "2603:3000::/24",
      "id": "COMCAST6NET",
      "name": "Comcast Cable Communications, LLC",
      "country": "US"
    },
    {
      "netblock": "2a03:2880:d001::/48",
      "id": "IE-FACEBOOK-201100822",
      "name": "Facebook Ireland Ltd",
      "country": "IE"
    }
  ]
}