Try Out the Best Phone Number Validator API for Free

by | Aug 25, 2023

In today’s digital age, where communication and data exchange have become vital for businesses, ensuring the accuracy of phone numbers is crucial. A Phone Number Validator API is a powerful tool that simplifies this process. It instantly verifies phone numbers and ensures their validity. In this blog, we’ll explore the concept of Phone Number Validation.

Moreover, we will also explore the numerous use cases of phone number validators across industries. Furthermore, we will discuss the essential features that make up the best API in this category. Moreover, we’ll look closer at Numverify, a leading Phone Number Validator API. Besides, we will guide you on seamlessly integrating it into your applications. Let’s get started!

Man trying phone number validator for phone validation and to check invalid phone numbers through phone validator

What Is a Phone Number Validator API?

A Phone Number Validator API enables developers to integrate phone number validation functionality into their applications. It serves as a gateway for applications to communicate with a specialized service that can verify the accuracy and legitimacy of phone numbers.

When users input phone numbers through an application, the Phone Number Validator API processes this data. Then, it checks whether the number is valid, properly formatted, and active. It also provides additional information, such as the country code and the telecom carrier associated with the number.

Moreover, it can help businesses ensure that user phone numbers are correct. Hence reducing errors, improving data quality, and enhancing communication efficiency. This API is widely used in various industries, including e-commerce, finance, telecommunications, and customer service.

business discussion on using a phone validator tool to get accurate phone data and validated phone numbers

What Are the Use Cases Of a Phone Number Validation Tool?

A Phone Number Validation Tool offers numerous use cases across various industries and applications. Here are some key scenarios where it proves to be invaluable:

User Registration and Authentication

During user sign-ups, phone number validation helps ensure that genuine and accurate contact information is provided. Hence reducing the risk of fake accounts and enhancing security.

E-commerce and Delivery Services

Validating phone numbers in online shopping platforms ensures smooth and reliable order delivery. Hence reducing failed deliveries due to incorrect contact details.

Marketing and Customer Engagement

Phone number validation aids businesses in maintaining updated customer databases. Hence allowing targeted and personalized communication through SMS or voice campaigns.

Fraud Prevention

Companies can prevent fraud by verifying phone numbers in financial transactions or online services.

Two-Factor Authentication (2FA)

Phone number validation is an essential component of 2FA systems. Hence adding an extra layer of security to user accounts and transactions.

Contact Center Efficiency

Valid phone numbers in customer support systems help agents reach out to customers effectively. Hence reducing call backlogs and improving service quality.

Address Verification

Combined with address data, phone number validation ensures the accuracy of contact information in shipping and logistics operations.

Online Booking and Reservations

In the travel and hospitality industries, validating phone numbers secures reservations and improves customer communication.

Social Media Platforms

Phone number validation assists in verifying user accounts. Hence, reducing the number of spam and fake profiles.

Healthcare Services

Phone number validation streamlines appointment scheduling, patient communication, and medical record management in the medical sector.

phone number validation work through a phone number validator tool or phone validation tool

What Are the Features of a Best Phone Number Validator API?

The Best Phone Number Validator API typically offers comprehensive features that cater to diverse needs. Here are some key features to look for in a top-notch API:

  • The API should have a high level of accuracy in verifying phone numbers. Hence distinguishing between valid and invalid and providing detailed insights on each number.
  • It should be capable of validating phone numbers from different countries and handling various formats.
  • The API should be able to determine the telecom carrier associated with a given phone number.
  • It should offer options to format phone numbers consistently according to a specified standard or region.
  • Real-time validation capabilities enable instant verification during user interactions. Hence providing immediate feedback to users and reducing errors.
  • The API should support batch processing to validate phone numbers in bulk, which is ideal for efficiently cleaning up and maintaining large databases.
  • It should seamlessly integrate with two-factor authentication systems.
  • The API should be able to handle a high volume of requests without compromising performance.
  • Clear and comprehensive documentation, including code examples and usage guidelines. It simplifies the integration process and developer onboarding.
  • The API should provide meaningful error messages and logs to help developers troubleshoot issues effectively.
  • Transparent pricing models and a free tier option enable developers to test the API’s functionality before committing to a paid plan.
  • Regular updates and responsive customer support ensure the API stays updated with industry standards.
man validating numbers through a phone validator api for personal and business numbers

What is Numverify?

Numverify provides a comprehensive yet user-friendly RESTful JSON API designed to validate and retrieve information. It works for national and international phone numbers from 232 countries worldwide. The API processes request instantly. Hence, cross-referencing the data with up-to-date international numbering plan databases. The results are conveniently delivered in JSON format. Moreover, they contain valuable details such as carrier information, geographic location, and line type data.

cell phone verification api or phone validation api

How To Use Numverify for Your Applications?

Here are some easy steps to use Numverify for your application.

Step 1: Obtain API Access Key

To initiate phone number validation with Numverify, the first step involves acquiring an API access key. This unique password can be obtained by registering on the Numverify website and receiving a free API access key. Once obtained, append the access key to the base endpoint URL.

Sign up free - Numverify phone number verification API

Step 2: Initiate API Request

Once you get the access key and sign up for the free plan, initiating an API request to verify the phone number is easy. By adding the phone number to the end of the base endpoint URL and attaching the access key, you can make the API request and receive a response.

Additionally, you can include a country code, format, or callback at the end of the phone number to obtain more detailed lookup API responses.

Step 3: Interpret the API Response

Upon making the API request, you will get an API response. Most Numverify API responses come in universal and lightweight JSON format. Common JSON object responses to take note of include:


It returns “true” if the entered phone number exists and is legitimate.


It displays the phone number in a clean format, devoid of special characters.

Local format

It indicates the national format of the phone number.

International Format

It provides the number’s international structure, special characters, and the respective country code.


If available, this object displays the location of the phone number.

It shows the carrier’s name to which the phone number is registered. This is particularly useful for businesses and marketers to verify phone numbers and identify fake profiles. However, carrier information may not be available for all phone numbers.

Line type

It indicates the type of line associated with the phone number, such as mobile, landline, toll-free, satellite, paging, etc.

Learn more in our comprehensive documentation.


Leveraging the best Phone Number Validator API can significantly enhance the accuracy of phone number validation processes. With real-time validation, international number support, carrier identification, and easy integration, these APIs are invaluable in numerous industries and applications. Moreover, Numverify is an excellent option for trying out the best Phone Number Validator API.

Numverify’s user-friendly interface, reliable results, and comprehensive JSON format responses make it a top business choice. Don’t miss the opportunity to experience the power of Numverify for yourself and streamline your phone number validation tasks effortlessly.


Can I Find Out Who Belongs to a Phone Number?

You can find out the owner of a phone number through reverse phone lookup services or phone number validator APIs.

Is There a 100% Free Phone Lookup?

While some services offer limited free phone lookups, a 100% free phone lookup with full details is rare.

How Can I Verify a Number for Free?

You can verify a number for free using Numverify’s trial API, which offers accurate and reliable phone number validation.

Is There a Way to Validate a Phone Number?

Numverify can help you validate a phone number.

Try Numverify’s Free Phone Number Validation API Now – Ensure Accurate Data and Enhanced Communication!

APILayer CTA Banner - Sign-Up Free for API Marketplace