How to Find Phone Carrier in JavaScript

by | Jul 31, 2023

If you are a developer working to integrate a feature to find carrier by phone number, this is for you. In order to find a phone carrier, there are multiple ways you can approach, all of them depending on your requirements, e.g., whether you want the application to be simple or sophisticated. This article will cover finding a phone carrier via JavaScript in your application.

What is a Phone Carrier?

A phone carrier is a company that provides mobile telecommunications services to customers. This company is mostly responsible for maintaining its infrastructure to ensure mobile devices can communicate with each other, for example, with cellular towers. Most phone carrier service provider offer voice, SMS messages, and data connection services. For example, companies like Verizon and AT&T are popular phone carriers.

How to Find Phone Carrier in JavaScript?

The following will discuss 2 effective ways you can find phone carrier information using JavaScript.

1. Using API-based Solutions

API method to find phone carrier

APIs act as a ready-to-use solution in order to get your phone carrier information. APIs, in general, are intermediaries. They allow users to interact with external systems or databases and programmatically get whatever information they need. In the context of phone carrier lookup, APIs specifically designed for this purpose offer a straightforward way in order to get the carrier details based on phone numbers.  

The following steps will use numverify API as an example. The numverify API is a RESTful JSON API that enables you to evaluate and obtain data about local and international phone numbers from 232 different countries across the world. 

Step 1: Sign up to an API provider

  • Go to the numverify website and sign up for an account.
Sign up free - Numverify phone number verification API

Step 2: Get an API Key

  • You will be assigned a unique API access key.
API method to find phone carrier

Step 3: Set up the JavaScript Project

  • Create a new JavaScript file or include the code from the following section in an existing project.

Step 4: Make an HTTP Request to the numverify API

const phoneNumber = "ENTER_PHONE_NUMBER_HERE";

const apiKey = "ENTER_API_KEY_HERE";

let apiUrl = `${apiKey}&number=${phoneNumber}&country_code=&format=1`;

// Make an HTTP request to numverify API


  .then((response) => response.json())

  .then((data) => {

    // Extract carrier information from the API response

    const carrierName = data.carrier;

    const country = data.country_name;

    // Process and use the carrier information as you want



Step 5: Review the Results

  • Once you run the code, the program will send an HTTP request with the phone number and API key to the API endpoint.
  • You can use the retrieved carrier information as you want, for example, you can simply log the information to the console.

2. Parsing Carrier Information from Phone Numbers

When you want to get carrier information without relying on external APIs, using proprietary parsing logic can be helpful. Using known carrier prefixes or patterns, this method analyzes the phone number itself in order to obtain carrier information.

The following is a code example:

function parseCarrier(phoneNumber) {

  const carrierPrefixes = {

    // Define carrier prefixes and their corresponding names

    '123': 'Carrier A',

    '456': 'Carrier B',

    '789': 'Carrier C',

    // Add more prefixes and carriers as needed


  const prefix = phoneNumber.slice(0, 3); // Extract the first 3 digits of the phone number

  // Check if the prefix exists in the carrier prefixes

  if (carrierPrefixes.hasOwnProperty(prefix)) {

    return carrierPrefixes[prefix]; // Return the corresponding carrier name


  return 'Unknown'; // If the prefix is not found, return 'Unknown' or handle it accordingly


// Usage example such as:

const phoneNumber = '1234567890';

const carrier = parseCarrier(phoneNumber);

console.log('Carrier:', carrier);

Custom parsing logic’s primary drawback is its dependency on a current set of carrier prefixes. It can be difficult in order to maintain precise and thorough parsing logic since carrier prefixes can change over time and new carriers can be established. Furthermore, this method could not offer as much data as a free carrier lookup API can do.

How to Use the Phone Carrier Information?

If you are a developer trying to use the phone carrier lookup service as a feature in your app, you have the option to customize the experience for users. In order to make it more clear, there can be specific features based on the user’s carrier. This kind of customization can, therefore, greatly increase the user experience. Moreover, carrier-specific features and offers can help strengthen partnerships with carriers.

Developers can enhance fraud detection and prevention tools by exploiting carrier data. For example, it is possible to spot suspicious patterns or behaviors linked to a specific carrier, activating extra security measures or signaling probable fraud. In order to add an additional degree of protection, carrier-based authentication techniques might be used. It is more difficult for unauthorized individuals to access sensitive information or carry out fraudulent activities when the user’s carrier is verified as part of the authentication process.

What are the Best Practices and Considerations to Find Phone Carrier?

When an application is involved with cell phone numbers, there’s always an alarming amount of security issues that come with it. So, you should make sure you prioritize and comply with relevant regulations. The following are some important best practices.

  • Before you use a phone number owner carrier data, get explicit user authorization by outlining the usage’s objectives and parameters in detail. 
  • In order to assure compliance and win over users’ trust, abide by privacy laws like the GDPR.
  • Implement a system where users receive error messages that are understandable and helpful. It should describe the problem and offer solutions. 
  • If the carrier information is unavailable, think about backup options or alternative delivery techniques. 
  • In order to ensure a good user experience, handle edge cases like overseas phone numbers or unsupported carriers. 

Why Should You Use numverify to Find Phone Carrier?

This article covered how you can easily implement finding phone carrier using code implementations. Developers can alter their apps’ behavior, offer carrier-specific functionality, and identify and stop fraud using carrier information. We discussed 2 ways you can implement the carrier lookup: using APIs and implementing it from scratch. Implementing from scratch comes with disadvantages, like difficulty maintaining over time. Therefore, we encourage using an API.

Numverify provides real-time validation and lookup for phone numbers across 232 countries. You can boost the user experience with personalized features and offers based on carrier information by integrating numverify into your application. You can also strengthen security measures with accurate data for fraud prevention. 

Take advantage of numverify’s powerful capabilities and get started by accessing their API.


How accurate is a phone carrier lookup tool in determining the carrier of a phone number?

There are legitimate services like numverify that provide accurate and up to date information. But, the accuracy can vary with the service.

Is it possible to find the carrier of any phone number, regardless of the country?

Yes, it is possible in order to find the carrier despite the variations in countries. Numverify, for example, provides a lookup service for phone numbers across 232 countries.

Are there any free methods available to find the carrier of a phone number?

Some carrier lookup services such as Truecaller offer free plans with limited usage. You can use these services if you are looking for short-term or individual usage.

Can I integrate carrier lookup functionality into my own application or website?

Yes, especially with the services that provide APIs. Using these APIs would require you to have some level of programming knowledge.

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