DNS Lookup Examples · Example 1 of 3 in Special Answers

A Name Without Records of the Requested Type

GEThttps://api.deepinfo.com/v1/lookup/dns

An A lookup of a name that exists but has no A record: rcode NOERROR, with raw and values null.

Param: domain type
Value: _dmarc.google.com A

Asks for the A records of _dmarc.google.com, a name that exists (it holds the TXT record of the DMARC example) but has no A record.

The lookup succeeds (conn_status: success, rcode: NOERROR) but returns nothing: raw and values are null. This is what any requested type without records looks like. Compare the next example, where the name does not exist at all and rcode is NXDOMAIN.

Request

curl

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

Python

import requests

url = "https://api.deepinfo.com/v1/lookup/dns"

params = {
    "domain": "_dmarc.google.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/lookup/dns?domain=_dmarc.google.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/lookup/dns?domain=_dmarc.google.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/lookup/dns?domain=_dmarc.google.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/lookup/dns?domain=_dmarc.google.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/lookup/dns?domain=_dmarc.google.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/lookup/dns?domain=_dmarc.google.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": "_dmarc.google.com",
  "requested_types": [
    "A"
  ],
  "responses": [
    {
      "type": "A",
      "conn_status": "success",
      "rcode": "NOERROR",
      "raw": null,
      "values": null,
      "server": "8.8.8.8"
    }
  ],
  "servers": [
    "8.8.8.8"
  ],
  "check_date": "2026-09-24T08:38:02Z"
}

Content-Type: application/json
ratelimit-limit: 100000
ratelimit-remaining: 99999
ratelimit-reset: 58
x-ratelimit-limit-minute: 100000
x-ratelimit-remaining-minute: 99999
deepinfo-request-id: 5f0c6a8e-1b2d-4c3e-9f4a-7b8c9d0e1f2a

Request

What this example sends. Every parameter is documented on DNS; the exact request is in the code panel.

Parameter	Value
`domain`query	`_dmarc.google.com`
`type`query	`A`

Reference updated September 24, 2026

Request

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