Get Company

IP to Company

The IP to Company API identifies the company associated with an IPv4 address.

Pass an IP address from your website visitor logs, server request data, or analytics platform, and get back the domain of the organisation behind that traffic. It’s best suited to B2B use cases: consumer ISP addresses will typically not resolve to a named company.

Use this endpoint to:

De-anonymise B2B website traffic
Trigger account-based marketing and sales workflows
Feed a website visitor identification pipeline

Need premium IP to Company data? If you are looking for flat files with premium IP to Company resolution and are willing to spend at least $10k/yr, please click here to talk to our data team.

Fair Use Policy: This API is subject to our Fair Use Policy for Enrichment.

Outcomes: A lookup that finds nothing is not an error. It returns HTTP 200 with status: "not_found", empty or null results, and the usual metadata — and costs no tokens, though it still counts as one request against your Fair Use requests limit. Read status, not the HTTP code, to tell a hit from a miss. The API’s only 404 is an unknown or retired tool name.

POST

ip_to_company

IP to Company

curl --request POST \
  --url https://api.moltsets.com/api/v1/tools/ip_to_company \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'User-Agent: <user-agent>' \
  --data '
{
  "ip_address": "8.8.8.8"
}
'

import requests

url = "https://api.moltsets.com/api/v1/tools/ip_to_company"

payload = { "ip_address": "8.8.8.8" }
headers = {
    "User-Agent": "<user-agent>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'User-Agent': '<user-agent>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ip_address: '8.8.8.8'})
};

fetch('https://api.moltsets.com/api/v1/tools/ip_to_company', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.moltsets.com/api/v1/tools/ip_to_company",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'ip_address' => '8.8.8.8'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "User-Agent: <user-agent>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.moltsets.com/api/v1/tools/ip_to_company"

	payload := strings.NewReader("{\n  \"ip_address\": \"8.8.8.8\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("User-Agent", "<user-agent>")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.moltsets.com/api/v1/tools/ip_to_company")
  .header("User-Agent", "<user-agent>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"ip_address\": \"8.8.8.8\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.moltsets.com/api/v1/tools/ip_to_company")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["User-Agent"] = '<user-agent>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"ip_address\": \"8.8.8.8\"\n}"

response = http.request(request)
puts response.read_body

{
  "results": {
    "companies": [
      {
        "domain": "acme.com",
        "percentage": "1.0"
      }
    ]
  },
  "status": "ok",
  "metadata": {
    "fair_use": {
      "records_remaining_5h": 179999,
      "records_reset_5h": "2026-07-15T18:53:16Z",
      "records_remaining_1w": 899999,
      "records_reset_1w": "2026-07-22T13:53:16Z"
    }
  }
}

Authorizations

Authorization

string

header

required

Pass your API key as a Bearer token. Keys follow the format ms_XXXXXXXXXXX.

Headers

User-Agent

string

required

Identifies the calling client. Any non-empty value is accepted — MoltSets does not validate its contents. Requests without this header are rejected with 403 Forbidden (error.code: forbidden).

Body

application/json

ip_address

string

required

IPv4 address to resolve.

Example:

"8.8.8.8"

Response

Success

IP to Company

curl --request POST \
  --url https://api.moltsets.com/api/v1/tools/ip_to_company \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'User-Agent: <user-agent>' \
  --data '
{
  "ip_address": "8.8.8.8"
}
'

import requests

url = "https://api.moltsets.com/api/v1/tools/ip_to_company"

payload = { "ip_address": "8.8.8.8" }
headers = {
    "User-Agent": "<user-agent>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'User-Agent': '<user-agent>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ip_address: '8.8.8.8'})
};

fetch('https://api.moltsets.com/api/v1/tools/ip_to_company', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.moltsets.com/api/v1/tools/ip_to_company",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'ip_address' => '8.8.8.8'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "User-Agent: <user-agent>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.moltsets.com/api/v1/tools/ip_to_company"

	payload := strings.NewReader("{\n  \"ip_address\": \"8.8.8.8\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("User-Agent", "<user-agent>")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.moltsets.com/api/v1/tools/ip_to_company")
  .header("User-Agent", "<user-agent>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"ip_address\": \"8.8.8.8\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.moltsets.com/api/v1/tools/ip_to_company")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["User-Agent"] = '<user-agent>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"ip_address\": \"8.8.8.8\"\n}"

response = http.request(request)
puts response.read_body

{
  "results": {
    "companies": [
      {
        "domain": "acme.com",
        "percentage": "1.0"
      }
    ]
  },
  "status": "ok",
  "metadata": {
    "fair_use": {
      "records_remaining_5h": 179999,
      "records_reset_5h": "2026-07-15T18:53:16Z",
      "records_remaining_1w": 899999,
      "records_reset_1w": "2026-07-22T13:53:16Z"
    }
  }
}

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Account

IP to Company

Authorizations

Headers

Body

Response