DNS History

GEThttps://api.deepinfo.com/v1/analyze/dns-history

Returns the historical DNS records Deepinfo has observed for a domain or FQDN, including values that have since changed or been removed (passive DNS). Use it to see how a domain's hosting, mail and name servers changed over time.

Request

curl

curl 'https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Accept: application/json'

Python

import requests

url = "https://api.deepinfo.com/v1/analyze/dns-history"

params = {
    "domain": "deepinfo.com",
    "type": "A"
}

headers = {
    "apikey": "YOUR_API_KEY",
    "Accept": "application/json"
}

response = requests.get(url, params=params, headers=headers)
response.raise_for_status()
print(response.json())

JavaScript

const url = "https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A";

const response = await fetch(url, {
  method: "GET",
  headers: {
    "apikey": "YOUR_API_KEY",
    "Accept": "application/json"
  },
});

const data = await response.json();
console.log(data);

package main

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

func main() {
	req, err := http.NewRequest("GET", "https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A", nil)
	if err != nil {
		panic(err)
	}
	req.Header.Set("apikey", "YOUR_API_KEY")
	req.Header.Set("Accept", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	body, err := io.ReadAll(res.Body)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(body))
}

Java

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Main {
    public static void main(String[] args) throws Exception {
        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A"))
            .header("apikey", "YOUR_API_KEY")
            .header("Accept", "application/json")
            .GET()
            .build();

        HttpResponse<String> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());

        System.out.println(response.body());
    }
}

using System;
using System.Net.Http;

using var client = new HttpClient();

var request = new HttpRequestMessage(HttpMethod.Get, "https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A");
request.Headers.Add("apikey", "YOUR_API_KEY");
request.Headers.Add("Accept", "application/json");

using var response = await client.SendAsync(request);
Console.WriteLine(await response.Content.ReadAsStringAsync());

PHP

<?php

$curl = curl_init();

curl_setopt_array($curl, [
    CURLOPT_URL => 'https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'apikey: YOUR_API_KEY',
        'Accept: application/json',
    ],
]);

$response = curl_exec($curl);

if ($response === false) {
    throw new RuntimeException(curl_error($curl));
}

echo $response . PHP_EOL;

Ruby

require 'net/http'
require 'uri'

uri = URI('https://api.deepinfo.com/v1/analyze/dns-history?domain=deepinfo.com&type=A')

request = Net::HTTP::Get.new(uri)
request['apikey'] = 'YOUR_API_KEY'
request['Accept'] = 'application/json'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: uri.scheme == 'https') do |http|
  http.request(request)
end

puts response.body

Response

200 OK · application/json

Response Body

{
  "fqdn": "deepinfo.com",
  "dn": "deepinfo.com",
  "subdomain": null,
  "records": [
    {
      "type": "a",
      "values": [
        {
          "value": "104.26.10.21",
          "time": [
            "2026-09-18T05:41:26Z",
            "2026-09-05T21:26:18Z",
            "2026-08-16T16:37:59Z"
          ]
        },
        {
          "value": "104.26.11.21",
          "time": [
            "2026-09-18T05:41:26Z",
            "2026-09-05T21:26:18Z",
            "2026-08-16T16:37:59Z"
          ]
        },
        {
          "value": "172.67.70.198",
          "time": [
            "2026-09-18T05:41:26Z",
            "2026-09-05T21:26:18Z",
            "2026-08-16T16:37:59Z"
          ]
        }
      ]
    }
  ]
}

Content-Type: application/json
ratelimit-limit: 1
ratelimit-remaining: 0
ratelimit-reset: 1
deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a

Authentication

Send your API key in the apikey request header.

Query Parameters

Parameter	Required	Description
`domain`	Required	Domain name or FQDN, e.g. `deepinfo.com` or `www.deepinfo.com`. IP addresses are not accepted. Example`deepinfo.com`
`type`	Optional	Record type to return, for example `A`. Omit to return every type. Example`A`

Response Fields

Field	Description
`fqdn`	The queried name
`dn`	Its registered domain
`subdomain`	Subdomain part, or `null`
`records[]`	One entry per record type
`records[].type`	Record type, in lower case, for example `a` or `mx`
`records[].values[]`	One entry per distinct value seen for that type
`records[].values[].value`	The value
`records[].values[].time`	Every time (UTC, newest first) that value was observed

Response Schema

Inferred from examples Built from the saved 2xx example response: the fields it contains, with the types seen there. It is not a contract.

Field	Type	Example
`fqdn`	string	`"deepinfo.com"`
`dn`	string	`"deepinfo.com"`
`subdomain`	null
`records`	array<object>
`records[].type`	string	`"a"`
`records[].values`	array<object>
`records[].values[].value`	string	`"104.26.10.21"`
`records[].values[].time`	array<string>	`"2026-09-18T05:41:26Z"`

Errors

400 if domain is not a valid FQDN.

Examples

The saved example from the Deepinfo API, shown in the request and response panels.

A RecordsGET/analyze/dns-history?domain=deepinfo.com&type=A200 OK

Worked Examples

Worked examples of this endpoint, each on its own page with the exact request and the response it returns.

Every Record Type of a DomainEvery record type Deepinfo has seen for deepinfo.com: A, AAAA, MX, NS, SOA, TXT and HINFO, each with its values over time.
A Record History of a DomainThe A record history of deepinfo.com: nine IPv4 addresses, from 192.185.32.176 (2017 to 2019) to the three current Cloudflare addresses.
Name Server History: HostGator to CloudflareThe NS history of deepinfo.com: HostGator name servers from 2018 to September 2019, Cloudflare name servers since January 2021.

See all examples

Reference updated September 27, 2026