NumVerify

Free, powerful JSON API offering international and national phone number validation and carrier, location, and line type lookup for developers and businesses. How to use the verify API to ensure your numbers are valid If you use numbers in your application, whether for identifying users or tracking data, you need to make sure those numbers are valid. The best way to do that is with the Twilio Verify API. In this blog post, we'll show you how to use the Verify API to ensure your numbers are valid.

What is a Reverse Phone Lookup, and How Does it Work?
A reverse phone lookup, also known as a reverse cell phone lookup, is a service that allows anyone to search for the name of a person or company from their phone number.
The service works by providing you with the name of the person or company that owns that particular phone number. It will also provide you with other details such as an address, date of birth, previous addresses, relatives, and more.