Top 5 Reliable Phone Number Validation API for Your Next Product

The first goal of every business is to gather leads and nurture them until they become customers and possibly loyal customers.

As part of this process, they collect personal information and contact details such as email addresses and phone numbers. 

However, they often don’t offer valid ones, which means you waste time and money having ineffective leads. 

Therefore, there are today validators that check that, for example, a phone number is active.

The web is filled with many phone number validation APIs, so choosing the right one can be a challenge.

As a result, in this article, we will examine some of the best phone number validation APIs, so that you can integrate them into your product and no longer waste time on useless leads.

So let’s get right into it.

What is a phone number validation API?

The phone number validation API is a solution that checks whether or not a phone number is active. Additionally, it can provide useful parameters, such as:

  • Location – city or region of origin
  • Type of phone number (cell phone or landline)
  • Phone carrier type

Where to use phone number validation API

It is possible to use a phone number validation API for a variety of purposes and situations. Here are some of the most common ones.

  1. Websites

Nowadays, every website has an online contact or subscription form, which allows you to collect information about visitors and customers and make it easy for them to contact you. 

If placed with the purpose of gathering valuable information and leads, forms must capture relevant and valid information, like phone numbers and emails. As a result, integrating a phone number validation API will allow you to ensure that numbers captured in your online forms are correct and valid.

  1. Apps

Similar to websites, apps might include forms that are purposely inserted to capture contact information from potential customers. Once again, you must ensure that these are valid and accurate, and a phone number validation API can help.

  1. CRM

A customer relationship management strategy is a way for a business or organization to manage customer interactions, usually by using data analysis to analyze and study a large amount of information. In order to ensure this information is valuable, a phone number validation API can check whether the numbers taken over the phone are valid and entered correctly by employees.

Benefits of using a phone number validation API

Many benefits can be attributed to a phone number validation API, which makes it convenient to use. Some of the most notable are outlined below.

  1. It saves you money

Consider running promotional campaigns and spending money on useless leads and invalid or inactive numbers. You will have to pay for all those leads once you begin a marketing campaign, for instance, and they won’t be of any use to you.

  1. Enhances conversion rate

By having valid and genuine leads, you are more likely to have a good conversion rate as people who are really interested in your product will be more likely to purchase it. Consider instead sending promotions to invalid phone numbers; it probably won’t yield the results you want.

  1. Prevents fraudulent entries

You can use phone number validation APIs to fight spammers and fraudsters who do not provide their phone numbers during signup. This adds an extra layer of security to maintain a clean and safe user base.

  1. Increases customer satisfaction

By keeping leads and customers informed throughout the process, you can also improve customer satisfaction, retention, and repeat order rates.

  1.  Improves campaign analysis

You can determine the success of your marketing and sales campaigns directly by how many phone calls you make. You can still get an incorrect picture of how well your strategy is working if a certain percentage of the phone calls go to the wrong numbers.

By getting a clean phone list, you can make sure that each call you make goes to the right person, which will optimize the results of your campaign.

  1. Reduces typos and errors 

A phone number validation API allows users to correct their contact data immediately right at the point of sign-up. You will be able to improve the quality of customer phone numbers in your CRM and ERP systems.

Best 5 reliable phone number validation API

In this section, we’ll provide you with the best five reliable phone number validation APIs for your next product.

  1. Abstract

From Abstract’s website

Abstract is a phone number validation API that lets you improve your contact rate and clean your lists.

In Abstract’s database, you can find phone numbers from over 190 countries, verify them and get data like the phone carrier and line type (landlines, cell phones, VOIP, etc) where available, so you can get a complete view of a number.

In addition, Abstract is secure and safe since every interaction with Abstract’s Phone Number Validation and Verification API is secured via 256-bit SSL encryption (HTTPS).

The product comes with detailed documentation, multiple easy-to-use libraries, and tutorials to help you integrate it quickly and easily.

Starting with a free version of up to 250 requests, it offers multiple plans based on different needs.

  1. NumVerify

From NumVerify’s website

NumVerify lets you keep your lead list clean and fight fraud by validating phone numbers at the point of entry into your system.

It can provide you with a wealth of information, such as location, country, carrier, and line type.

In addition to supporting 230 countries, its format validation system is based on regularly updated international phone numbering plans.

By connecting to the API via HTTPS, NumVerify ensures secure and encrypted data streams.

You can validate 250 phone numbers per month for free. The service also offers cheap and affordable plans if you need more.

  1. Loqate

From Loqate’s website

Loqate provides accurate and up-to-date information about each number using its excellent phone number validation API.

It allows you to check not only the length of a phone number but also the carrier’s location. 

Additionally, it offers a flexible API that lets you access insights and validate at any time – at the point of capture, before sending, or by batch. 

Up to five phone numbers can be verified for free using this tool. If you are an enterprise, you can get a customized price, or you can choose a pay-as-you-go plan.

  1. Byteplant

From Byteplant’s website

Byteplant provides antispam and backup software solutions as well as phone number validation.

240 countries worldwide are supported, enabling you to check and easily clean up existing contact data or verify if phone numbers are valid and callable.

In addition, the service ensures compliance with the FCC Telephone Consumer Protection Act (TCPA) by detecting the correct line type.

Among the key features of Byteplant phone validator API are free plugins for WordPress, jQuery, Node.js, etc., Easy integration through Zapier, phone list de-duplication, phone number correction, and re-formatting in line with national and international standards, among other benefits.

  1. Dexatel

From Dexatel’s website

With Dexatel’s phone number validation API, you can verify numbers in real-time as they enter the system. The API can be easily integrated into your website or mobile application.

It is also extremely easy to use; you just have to type in the user’s phone number and select the country. Upon activation, the service will inform you if the number is valid.

What’s even better is your results are accurate and the service is free.

6. numlookupapi is an easy-to-use & feature complete JSON REST API that provides phone data for 230+ countrie

How to choose the right phone number validation API

In spite of our shortlist of the five best phone number validation APIs, you still have to think about a few alternatives before choosing one. To help you further, we have listed some considerations you should consider to make an informed decision.

  1. Consider its cost

Not all phone number validation APIs are free to use. Even though they might offer a free trial, the cost is often steep or not, depending on your availability and budget. Therefore, the cost is often one of the main determining factors.

  1. Check country availability

There are some phone validators that may not allow you to check numbers from around the world, and some of them may exclude certain numbers. When you know your target audience, you must check if the phone number validation API will allow you to check your users’ numbers from their country.

  1. Take into account the features

The features offered by each phone number validation API are unique and distinctive. A few of them may be essential to your business, while others may be unnecessary. Additional features might increase the cost of the service, so if you don’t need them, you can opt for a cheaper, more essential solution.


APIs that verify phone numbers are imperative for obtaining quality leads and maximizing your conversion rate. 

This blog post provided you with a list of the best phone number validation APIs that come with unique features and their own plans. 

It is our hope that one of the ones listed above suits your needs and preferences. 

I appreciate you taking the time to read this article. See this blog post on API security – 6 best practices to follow if you want to learn more about this topic.

AuthorFlavia Silipo is a skilled SEO copywriter and digital marketing specialist with over two years of experience. You can find her on LinkedIn.
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