Real-time phone validation with carrier, line type, location & format intelligence for 248+ countries. Ensure every number is dial- and SMS-ready.
Our solutions have been adopted by
in real time and at scale.

Perform high-speed phone validation across 248+ countries. Our engine doesn't just check syntax; it verifies the active status of numbers in under 200ms, ensuring your database remains 100% outreach-ready.

Toggle on Smart Validation for high-value leads. This feature triggers a deep, real-time telecom query to verify carrier, linetype, and live reachability, providing a 99.9% accuracy rate when it matters most.

Gain deep intelligence on every lead with our phone number validator. Instantly identify if a number is Mobile, Landline, or VoIP, and retrieve the registered Network Carrier. This data can be used to scrub landlines from SMS lists and save up to 40% on messaging costs.

Automatically correct and reformat international numbers to the global E.164 standard. By eliminating formatting errors that lead to failed SMS deliveries and ensure seamless integration with any global CRM or dialer.

Automatically determine the Region, City, and Timezone of your prospects using our advanced phone validation. Plan perfectly timed cold calling schedules and SMS campaigns to avoid "silent hours" and maximize your engagement rates.

An accurate, real-time API which integrates easily with web forms, mobile applications or tailor-made solutions. Avoid invalid phone numbers upon input and build a "Zero-Junk" contact database.

Upload your CSV or XLSX contact lists and let ClearoutPhone do the heavy lifting. Validate thousands of numbers in one go, get instant status on each - valid, or invalid - and download a clean, enriched file ready for your CRM, dialer, or SMS platform. No coding required.

Powered by a globally distributed infrastructure with sub-200ms response times and 99.9% uptime SLA. Whether you're validating a single number at point-of-capture or processing a million-row list overnight, ClearoutPhone delivers consistent, enterprise-grade speed without throttling or downtime.
Validate phone numbers in real time to reach the right users,
on the right channel, with accurate data.
User submits
phone number
Real-time checks for
validity & insights
Improve SDR efficiency by prioritizing leads based on Line-Type. Automatically route mobile numbers to the sales queue for an immediate high-priority follow-up and landlines to an automated voice drop campaign. Ensure 100% of your team's time is spent talking to reachable contacts.
Scale globally in your Go To Market strategy without worrying about international telecom quirks. Phone number validation is a complex field with international formatting, dial plan logic for over 248+ countries-making international outbound efforts formatted accurately per E.164 guidelines.
Discover the network carrier of the subscribers prior to running bulk SMS campaigns. By filtering landlines, VoIP, and invalid number range marketers save from 40% on messaging and do not trigger the brand as a spam number by carriers.
Don't call or text when your prospects are sleeping. Use real-time Timezone and DST enrichment to sync your automated sequences with the prospect's local time, significantly increasing answer rates and conversion during peak business hours.
Integrate the industry’s fastest phone validation API into your sign-up forms, checkout flows, or internal CRM in minutes. Our REST API provides a “Zero-Junk” gateway for your user data.
curl -X POST 'https://api.clearoutphone.io/v1/phonenumber/validate' \
-H 'Authorization: Bearer:REPLACE_WITH_YOUR_API_TOKEN' \
-H 'Content-Type: application/json' \
-d '{ "number": "7766733573", "country_code": "GB" }' 'https://api.clearoutphone.io/v1/phonenumber/validate',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => '',
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => 'POST',
CURLOPT_POSTFIELDS => '{ "number": "7766733573", "country_code": "GB" }',
CURLOPT_HTTPHEADER => array(
"Content-Type: application/json",
"Authorization: Bearer:REPLACE_WITH_YOUR_API_TOKEN"
),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
$response = json_decode($response, true);
echo "Phone number " . $response['data']['international_format'] . " is " . $response['data']['line_type'] .
" from " . $response['data']['carrier'] . " provider belong to " . $response['data']['country_name'] .
" located at " . $response['data']['location'];
}
?>import java.io.*;
import java.util.*;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.util.EntityUtils;
import org.apache.http.client.HttpClient;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.json.JSONObject;
public class InstantVerifyExample {
public static void main(String[] args) {
try {
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost("https://api.clearoutphone.io/v1/phonenumber/validate");
post.setHeader("Content-Type", "application/json");
post.setHeader("Authorization","Bearer:REPLACE_WITH_YOUR_API_TOKEN");
String payload = "{ \"number\": \"7766733573\", \"country_code\": \"GB\" }";
StringEntity requestEntity = new StringEntity( payload, ContentType.APPLICATION_JSON);
post.setEntity(requestEntity);
HttpResponse response = client.execute(post);
JSONObject jsonResponse = new JSONObject(EntityUtils.toString(response.getEntity()));
JSONObject result = jsonResponse.getJSONObject("data");
System.out.println("Phone number " + result.getString("international_format") + " is " + result.getString("line_type") +
" from " + result.getString("carrier") + " provider belong to " + result.getString("country_name") +
" located at " + result.getString("location"));
} catch(Exception e) {
System.out.println(e);
}
}
}var request = require("request");
var options = {
method: 'POST',
url: 'https://api.clearoutphone.io/v1/phonenumber/validate',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer:REPLACE_WITH_YOUR_API_TOKEN',
},
body: { "number": "7766733573", "country_code": "GB" },
json: true
};
request(options, function (err, response, body) {
if (err) throw new Error(err);
console.log('Phone Number: ', body.data.international_format);
console.log('Status: ', body.data.status);
console.log('Phone number ' , body.data.international_format , ' is ' , body.data.line_type ,
' from ' , body.data.carrier , ' provider belong to ' , body.data.country_name ,
' located at ' , body.data.location);
});import requests
url = "https://api.clearoutphone.io/v1/phonenumber/validate"
payload = '{ "number": "7766733573", "country_code": "GB" }'
headers = {
'Content-Type': "application/json",
'Authorization': "Bearer:REPLACE_WITH_YOUR_API_TOKEN",
}
response = requests.request("POST", url, data=payload, headers=headers)
response = response.json()
print('Phone Number: ', response['data']['international_format'], '\n')
print('Status: ', response['data']['status'])
print("Phone number " , response['data']['international_format'] , " is " , response['data']['line_type'] ,
" from " , response['data']['carrier'] , " provider belong to " , response['data']['country_name'] ,
" located at " , response['data']['location'])package main
import (
"fmt"
"io/ioutil"
"net/http"
"strings"
"encoding/json"
)
type HttpResponseData struct {
Data struct {
International string `json:"international_format"`
LineType string `json:"line_type"`
Carrier string `json:"carrier"`
Country string `json:"country_name"`
Location string `json:"location"`
} `json:"data"`
}
func main() {
url := "https://api.clearoutphone.io/v1/phonenumber/validate"
payload := strings.NewReader(`{ "number": "7766733573", "country_code": "GB" }`)
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Authorization", "Bearer:REPLACE_WITH_YOUR_API_TOKEN")
res, err := http.DefaultClient.Do(req)
if err != nil {
fmt.Println(err)
} else {
defer res.Body.Close()
body, _ := ioutil.ReadAll(res.Body)
var response HttpResponseData
err = json.Unmarshal(body, &response)
if err != nil {
fmt.Println(err)
}
fmt.Println("Phone number " , response.Data.International , " is " , response.Data.LineType ,
" from " , response.Data.Carrier , " provider belong to " , response.Data.Country ,
" located at " , response.Data.Location)
}
}using System;
using System.IO;
using System.Net;
using System.Text;
using Newtonsoft.Json.Linq;
namespace Examples.System.Net
{
public class InstantVerifyExample
{
public static void Main()
{
WebRequest request = WebRequest.Create("https://api.clearoutphone.io/v1/phonenumber/validate");
request.Method = "POST";
string postData = "{ \"number\": \"7766733573\", \"country_code\": \"GB\" }";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
request.ContentType = "application/json";
request.ContentLength = byteArray.Length;
request.Headers.Add("Authorization", "Bearer:REPLACE_WITH_YOUR_API_TOKEN");
Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse response = request.GetResponse();
dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string responseFromServer = reader.ReadToEnd();
JObject joResponse = JObject.Parse(responseFromServer);
Console.WriteLine("Phone number " , joResponse["data"]["international_format"] , " is " , joResponse["data"]["line_type"] ,
" from " , joResponse["data"]["carrier"] , " provider belong to " , joResponse["data"]["country_name"] ,
" located at " , joResponse["data"]["location"]);
reader.Close();
dataStream.Close();
response.Close();
}
}
}We take your data security seriously. That's why we use 256-bit SSL encryption to secure the entire transmission and safeguard your information.
We safeguard your data and offer flexible retention options for your phone number list, with default retention of 30 days or customized retention periods upon request.
We comply with the highest standards of data security, including compliance with GDPR, SOC 2 Type II and ISO norms, to ensure that your customer data is always protected.
Your Success, Our Proof.

Phone validation is essential for ensuring that your sales development representatives are making the most of their call time. ClearoutPhone ensures that your sales development representatives call only validated numbers.

We were burning budget on SMS campaigns that never landed. ClearoutPhone cut our bounce rate by 38% in the first month. Now every number in our list is dial- and SMS-ready before we hit send.

The carrier and timezone data alone changed how we schedule outreach. We stopped calling landlines at 9pm and our connect rates jumped. It's become a non-negotiable part of our stack.
Validate every phone number in real time to reach the right people, on the right channel, every time.
Results in < 200ms
Smart Validation
248+ Countries
Improve deliverability.