Our hosted domains, or reverse IP API shows you information about domain names that are hosted on an IP address. You can lookup details by IP address, or domain, and the response includes a count of the number of domains hosted on the IP address, plus the 25 most popular domains (based on Alexa rank).

This API is currently only available as part of our enterprise plan. Contact us if you're interested in a trial or demo.

curl ipinfo.io/domains/comcast.net?token=$TOKEN
{
  "domain": "comcast.net",
  "ip": "69.252.80.75",
  "asn": "AS7922",
  "count": 939,
  "range": "69.240.0.0/12",
  "domains": [
    [
      "comcast.net",
      "comcast.com",
      "watchable.com",
      "comcastnow.com",
      "comcastsportsnet.com",
      "xfinityprepaid.net",
      "comcastaddelivery.com",
      "bigtoptestdrive.com",
      "gotgearamazingoutdoors.com",
      "comcastspotlight-mediafactbook.com",
      "entertainmentmoney.com",
      "footballmaniasweepstakes.com",
      "jobsatcomcast.com",
      "anyscreem.org",
      "amyscreen.net",
      "amalunasweeps.com",
      "comcastlabs.com",
      "anycreen.org",
      "coloradotruckauthority.com",
      "touchdownandtailgate.com",
      "readytoridemonroepbr.com",
      "anysceren.net",
      "bostonhealthads.com",
      "comcastspotlight-3d-hlly.com",
      "fordfrugalista.com"
    ]
  ]
}

You can also get details about the total number of domains hosted on the ASN or IP address range associated with the IP address or domain, and examples of other IP addresses that are also hosting domains within the range or ASN:

curl ipinfo.io/domains//69.240.0.0/12?token=$TOKEN
{
  "range": "69.240.0.0/12",
  "count": 942,
  "number_of_ips": 4,
  "ips": [
    "69.252.80.75",
    "69.252.105.57",
    "69.252.80.252",
    "69.252.36.29"
  ]
}
curl ipinfo.io/domains/AS7922?token=$TOKEN
{
  "asn": "AS7922",
  "count": 100138,
  "number_of_ips": 49023,
  "ips": [
    "69.252.80.75",
    "50.227.29.166",
    "70.89.136.145",
    "173.160.185.50",
    "107.0.102.32",
    "173.162.32.57",
    "50.205.133.134",
    "96.68.242.84",
    "75.151.158.28",
    "107.0.13.25"
  ]
}