Phone Validator

Global Phone Validator for Better Outreach
Reach the Right

Real-time phone validation with carrier, line type, location & format intelligence for 248+ countries. Ensure every number is dial- and SMS-ready.

Real-time Validation Results in <200ms
99.9% Accuracy Smart Validation
Global Coverage 248+ Countries
Enable Smart Validation (Deep Check)
Line Type
Carrier
Location
Status



Trusted By Businesses of All Sizes Worldwide


Our solutions have been adopted by 60,000+ businesses worldwide to efficiently identify valid phone numbers and qualify leads
in real time and at scale.


G2
★★★★½
4.9 / 5
★★★★½
4.9 / 5
SOC 2
TYPE II
ISO 27001
ISO 27001
Certified
GDPR
Compliant

Free Real-Time Carrier & Line-Type Lookup


validate any phone number instantly → block fakes, detect line types, and time outreach perfectly.


Phone Validator Features


Everything you need to validate, enrich, and maintain a clean phone database; in real time or at scale. Built for marketers, developers, and revenue teams who can't afford bad data.

Real-Time Global Validation

Real-Time Global
Validation

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.

Smart Validation Precision

Smart Validation
(On-Demand Precision)

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.

Advanced Carrier & Line-Type Lookup

Advanced Carrier & Line-Type Lookup

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.

E.164 Standardization & Formatting

E.164 Standardization & Formatting

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.

Geolocation & Timezone Enrichment

Geolocation & Timezone Enrichment

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.

Developer-First REST API

Phone Validation API for Developers

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.

Bulk List Phone Number Validation

Bulk Phone Number Validation

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.

Performance

Performance

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.

Use cases

Why Phone Validation Matters

Validate phone numbers in real time to reach the right users,
on the right channel, with accurate data.

Phone Input
Phone Input

User submits
phone number

------->
Validation Engine
Validation Engine

Real-time checks for
validity & insights

------->
Clean Data
  • Clean Data
  • Enriched Data
  • De-Duplication
  • Dial & SMS Ready
Reduce Wasted Spend

Lead Scoring & Routing Optimization

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.

Smarter Personalization

Global Market Expansion (248+ Countries)

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.

Better Segmentation

SMS Budget Protection & Deliverability

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.

Higher Quality Leads

Perfectly Timed Outreach (Timezone & DST)

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.

Phone Validator API

Built for Developers. Optimized for Scale.

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.

POST api.clearoutphone.io/v1/phonenumber/validate
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();
        }
    }
}
<200ms
Ultra-low latency Real-time validation during onboarding
99.9%
Uptime SLA Enterprise-grade, redundant global servers
15+ Data Points
E.164 standard Ready for any global SMS gateway
Rich JSON response:
status line_type carrier location country_name country_timezone country_code e164_format + 7 more
Returned per request


Data Security

Data Encryption

We take your data security seriously. That's why we use 256-bit SSL encryption to secure the entire transmission and safeguard your information.

Data Retention

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.

Compliance

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.


WHAT CLIENT SAYS

Your Success, Our Proof.

Matt Jennings

Matt Jennings

Head of Sales Operations

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.

Sarah Mitchell

Sarah Mitchell

Director of Marketing Ops

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.

Raj Patel

Raj Patel

Revenue Operations Lead

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 Number. Connect With Confidence.

Validate every phone number in real time to reach the right people, on the right channel, every time.

Real-time Validation

Results in < 200ms

99.9% Accuracy

Smart Validation

Global Coverage

248+ Countries

Drive better results

Improve deliverability.


Frequently Asked Questions:


What is phone validation and why is it important?
Phone validation is the process of checking whether a phone number is valid and correctly formatted. It is important because it helps ensure accurate contact data, improves message delivery, reduces errors, and prevents fake or invalid numbers.
How does phone validation work?
Phone validation works by cross-referencing phone numbers against the global databases to check if the phone number was issued and is registered in the global directory to determine their authenticity and accuracy.
Does a valid phone number mean it is reachable or active?
No, a valid number does not necessarily indicate that it is currently in use or reachable. Due to the fact that phone numbers are subject to being turned on and off and are considered highly personal, it is impossible to determine whether they are active or not until a message is sent or a call is made.
How can I check if a phone number is valid?
To check if a phone number is valid or not, you can use a phone number validator like ClearoutPhone. Simply input the phone number, and our phone validator will quickly tell you its authenticity, helping you maintain a clean and accurate phone database.
Can I validate phone numbers in bulk or in real time?
Yes, you can validate phone numbers using ClearoutPhone in bulk by uploading your contact list in CSV or XLSX format and downloading cleaned results. You can also use a real-time phone validation API to instantly verify numbers at the point of entry, such as website forms or apps.
Can I check if a phone number is mobile or landline?
Yes, you can check if a phone number is mobile or landline or VOIP and many other linetypes using ClearoutPhone. Our phone validator accurately identifies the line type, enabling you to tailor your communication strategies accordingly.
Can I check if international phone numbers (US, UK, etc.) are valid?
Absolutely! You can check US, UK and 248+ other countries phone numbers for their validity using ClearoutPhone.
What is the difference between Standard and Smart Validation?
Standard Validation (formerly Basic) is a cost-effective mode that provides essential data for 1 credit.

Smart Validation is an advanced mode that automatically triggers deeper, real-time telecom queries for numbers that are harder to verify (like recently ported or VoIP lines). While Smart Validation can cost up to 5 credits for these deeper checks, it ensures maximum reachability.
Which validation mode is enabled by default?
By default, Standard mode is enabled for all users. You can choose to enable Smart Validation within your settings to ensure the highest level of accuracy for your phone lists.
Why does Smart Validation cost more?
It involves real-time queries across multiple telecom data sources to determine the current status of a number. This added depth ensures higher accuracy for numbers that cannot be verified reliably using basic checks.
Does Smart Validation always use 5 credits?
No. Smart Validation is designed to be dynamic and cost-efficient. Most numbers will still only cost 1 credit, just like Standard validation. The system only triggers "Deeper Checks" which can cost between 1 to 5 credits, when it encounters uncertain data ranges (such as recently ported numbers or certain VoIP lines) that require real-time telecom queries to ensure accuracy.

By using Smart Validation, you ensure the highest level of reachability data without necessarily paying the maximum credit price for every single number in your list.
Will I be charged again if I validate the same number multiple times?
No. Within our smart caching window, repeated validations of the same number won’t trigger additional deep validation charges. This helps you avoid duplicate costs while still ensuring accuracy when a number’s status may have changed.
Can I track how credits are used?
Yes. Your usage logs clearly show when deeper validation was applied, giving you full transparency into credit usage.