An IPv6 Address (HTTP 400)

GEThttps://api.deepinfo.com/v1/lookup/ip-whois

An IPv6 address (ip=2001:4860:4860::8888, Google Public DNS): the API answered HTTP 400, "The given input is not a valid IP."

Param: ip
Value: 2001:4860:4860::8888

Asks for the IP WHOIS record of 2001:4860:4860::8888, the IPv6 address of Google Public DNS.

The reference describes ip as an IPv4 or IPv6 address, but on September 24, 2026 the API answered HTTP 400 for every IPv6 address we tried, in short and in full notation: code 10400, and for the parameter ip the subcode 12000 with "The given input is not a valid IP.". Until IPv6 addresses are accepted, look up IPv4 addresses only.

Request

curl

curl 'https://api.deepinfo.com/v1/lookup/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888' \
  -H 'apikey: YOUR_API_KEY' \
  -H 'Accept: application/json'

Python

import requests

url = "https://api.deepinfo.com/v1/lookup/ip-whois"

params = {
    "ip": "2001:4860:4860::8888"
}

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/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888";

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/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888", 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/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888"))
            .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/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888");
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/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888',
    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/ip-whois?ip=2001%3A4860%3A4860%3A%3A8888')

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

400 Bad Request · application/json

Response Body

{
  "code": 10400,
  "parameters": [
    {
      "param": "ip",
      "subcode": 12000,
      "details": [
        "The given input is not a valid IP."
      ]
    }
  ],
  "solution": "https://docs.deepinfo.com/reference/"
}

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

Request

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

Parameter	Value
`ip`query	`2001:4860:4860::8888`

Reference updated September 24, 2026

Request

Related Examples