$url = "https://ippocloud.com/api/v1
/operator-lookup/get-operator-circle?phone_number=734843XXXX";
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
$headers = array(
   "Authorization: Basic bGl2ZV82MzAzZT....",
);
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

$resp = curl_exec($curl);
curl_close($curl);
var_dump($resp);

var url = "https://ippocloud.com/api/v1
/operator-lookup/get-operator-circle?phone_number=734843XXXX";
var xhr = new XMLHttpRequest();
xhr.open("GET", url);
xhr.setRequestHeader("Authorization", "Basic bGl2ZV82MzAzZT....");
xhr.onreadystatechange = function () {
   if (xhr.readyState === 4) {
      console.log(xhr.status);
      console.log(xhr.responseText);
   }};
xhr.send();

import requests
from requests.structures import CaseInsensitiveDict
url = "https://ippocloud.com/api/v1
/operator-lookup/get-operator-circle?phone_number=734843XXXX"
headers = CaseInsensitiveDict()
headers["Authorization"] = "Basic bGl2ZV82MzAzZT...."
resp = requests.get(url, headers=headers)
print(resp.status_code)

URL url = new URL("https://ippocloud.com/api/v1
/operator-lookup/get-operator-circle?phone_number=734843XXXX");
HttpURLConnection http = (HttpURLConnection)url.openConnection();
http.setRequestProperty("Authorization", "Basic bGl2ZV82MzAzZT....");
System.out.println(http.getResponseCode() + " " + http.getResponseMessage());
http.disconnect();

var url = "https://ippocloud.com/api/v1
/operator-lookup/get-operator-circle?phone_number=734843XXXX";
var httpRequest = (HttpWebRequest)WebRequest.Create(url);
httpRequest.Headers["Authorization"] = "Basic bGl2ZV82MzAzZT....";
var httpResponse = (HttpWebResponse)httpRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
   var result = streamReader.ReadToEnd();
}
Console.WriteLine(httpResponse.StatusCode);