Enhancing Web Forms with Numverify: Your Guide to Online Phone Number Verification

by | Mar 16, 2024

Online interactions have become ubiquitous. As a result, checking the accuracy of user-provided information is now a highly prioritized task, especially in web forms. Phone number validation is an important step in this process. It guarantees that the contact details submitted are authentic and is also usable. With the rise of spam, fraud, and user errors, the need to validate phone number online has increased substantially. Introducing, numverify, a reliable API solution designed to simplify and improve this validation process. Numverify offers the means to verify phone numbers in real time, enabling businesses to authenticate user data efficiently and securely. In this guide, we’ll explore the importance of phone number validation and walk you through the integration of numverify API.

Benefits of Online Phone Number Verification

Benefits of validating phone numbers online using a phone number validation tool

Online phone number verification is made much easier by using numverify API integration. It also offers multiple benefits which can improve both data quality and user experience. Some of these benefits are listed below.

  • Using a phone number checker allows businesses to guarantee the accuracy of user-provided phone numbers. This leads to improved data quality within their customer databases. 
  • Real-time phone verification enables businesses to validate phone numbers instantly, reducing the chances of invalid or disconnected numbers entering their systems. 
  • Bulk phone number validation provided by a phone validation tool like numverify API simplifies the process. Businesses can then validate phone numbers in large quantities efficiently. 
  • By maintaining clean and accurate phone data, businesses can deliver timely and relevant messages, improve customer satisfaction, and ultimately increase business performance, maximizing revenue opportunities in the process.

Numverify API Overview

Numverify API is one of the best solutions for real-time phone number verification. It offers multiple features to simplify the process. Acting as a phone validation tool, numverify API can work easily with various platforms, allowing businesses to validate phone numbers in no time. Its capabilities extend beyond simple validation. It can also validate phone numbers in bulk for efficient processing of large datasets. By using numverify API, businesses can be sure of the validity of phone numbers within their customer databases. This will also increase their data quality and improve customer experience. 

With the ability to verify both personal and business numbers, numverify API can fulfill the needs of a wide range of clients. Additionally, it provides details regarding mobile number active status, line type, and network provider, allowing businesses to make the right decisions. The flowchart below shows the workflows of data validation that take place in phone validator tools like numverify.

workflows of data validation of phone verification api

The numverify API can be seen as a flexible tool that can be used to generate timely and relevant messages, validate phone numbers online, or clean up phone numbers in order to increase your income potential and improve business performance.

Step-by-Step Integration Guide

Guide which shows how to integrate a phone verification tool like Numverify with forms

Integrating numverify API into web forms is a process that improves data accuracy and user experience. Below is a step-by-step guide on how to integrate numverify API into a user registration form using HTML and JavaScript.

Step 1: Set Up Your Environment

Check whether you have a text editor for writing your HTML and JavaScript code and a web browser installed for testing your web form.

Step 2: Create the HTML Form

Start the process by creating an HTML form to collect user information such as username, email, and phone number. An example is given below.

<html lang="en">
    <h2>User Registration</h2>
    <form id="registrationForm">
        <label for="username">Username:</label>
        <input type="text" id="username" name="username" required><br><br>
        <label for="email">Email:</label>
        <input type="email" id="email" name="email" required><br><br>
        <label for="phone">Phone Number:</label>
        <input type="tel" id="phoneNumber" name="phone" required><br><br>
        <button type="submit">Submit</button>
    <div id="verificationStatus"></div>
    <script src="script.js"></script>

Step 3: Create the JavaScript File

Next, create a JavaScript file to handle form submission and phone number validation. We have provided a JavaScript code below.

document.getElementById('registrationForm').addEventListener('submit', function(event) {
    const phoneNumber = document.getElementById('phoneNumber').value;
        .then(response => response.json())
        .then(data => {
            if (data.valid) {
                document.getElementById('verificationStatus').innerHTML = "Entered number is valid!";
            } else {
                document.getElementById('verificationStatus').innerHTML = "Entered number is invalid!";
        .catch(error => {
            console.error('Error:', error);
            document.getElementById('verificationStatus').innerHTML = "Error encountered. Try again later.";

Step 4: Replace YOUR_ACCESS_KEY with Your numverify API Key

Replace ‘YOUR_ACCESS_KEY’ in the JavaScript code with your actual numverify API key. This key is necessary to authenticate your requests to the numverify API and access its features.

Step 5: Test Your Integration

Open the HTML file in a web browser and fill out the user registration form. Submit the form with both valid and invalid phone numbers to test the integration. Check whether the validation status is displayed correctly based on the response from the numverify API.

Best Practices for Phone Number Verification

Implementing effective phone number verification processes is necessary to maintain data accuracy and improve user experience. In Fact there is research that shows how validating user-provided information impacts user experience. Given below are some of the best practices that we recommend.

  • Use a phone validation tool like numverify API integration for real-time verification.
  • Conduct bulk phone number validation to efficiently process large datasets.
  • Verify both personal and business numbers to customize communication strategies effectively.
  • Ensure timely and relevant messages by validating mobile number active status and network provider information.
  • Maintain data quality by reducing the presence of disconnected or invalid numbers within customer databases.
  • Incorporate phone number verification processes into marketing efforts to maximize business performance.
  • Regularly update and validate phone numbers to prevent outdated or incorrect information.
  • Implement measures to handle invalid or wrong numbers gracefully, providing clear instructions or alternative contact methods.
  • Continuously monitor the effectiveness of phone number verification processes and adjust as necessary to meet business needs.
  • Consider integrating additional features such as line type verification to further improve data accuracy and customer experience.

Case Studies or Examples

Numverify, a phone validator tool can easily integrate with Appy Pie

Many companies worldwide have started using numverify for their phone number verification needs. One such client is appypie. Its integration with numverify API has transformed multiple businesses, upgrading their operations and increasing productivity. For instance, a marketing agency is using appypie Connect to automate its lead generation process. By integrating numverify with their CRM system, they ensured that only valid phone numbers were collected from potential leads. This not only improved the accuracy of their customer database but also saved significant time and effort previously spent on manual data validation. 

Similarly, an e-commerce store is using appypie Connect to automate order notifications. By integrating numverify with their messaging platform, they could verify and send order confirmation messages with verified phone numbers in real time, ensuring timely and relevant communication with customers. This case study shows how numverify is making a difference and allowing companies to get their work done that much easier. 


Phone number validation plays a major role in maintaining data accuracy and improving customer communication for businesses. Numverify offers a reliable solution for real-time phone verification which allows businesses to validate phone numbers online. By integrating numverify into their work, businesses can simplify their processes, improve data quality, and deliver timely and relevant messages to their customers. With features such as bulk phone number validation and integration with other platforms through services like appypie connect, numverify provides businesses with the ability to automate tasks and upgrade operations. If you have read this far, you have understood that numverify is one of the best phone number validation services out there and there is only one thing left to do, and that is to get your very own subscription at numverify.


What is phone number validation?

Phone number validation can be used to check the legitimacy of a provided phone number.

Is numverify safe?

Yes, numverify is safe to use for phone number validation, as it securely verifies phone numbers in real time.

How can I verify my number for free?

You can verify your number for free by using online services like numverify which offers free plans. They may however limit certain features in the free plan.

How can I find the owner of a mobile number?

You can find the owner of a mobile number through reverse phone lookup services available online.

Sign up free - Numverify phone number verification API