Validate Phone Number Existence for United States

Question

Hi,

I wanna validate a given phone number for United States in C#. Is there any API or something for that which helps programmers to validate phone numbers existence. I don't wanna only validate if they're matching the format of phone numbers for USA but also their existence.

Thanks in advance.

Answer 1

You could validate phone number formats using a Regex such as those listed here, but in order to validate if the phone number really exists you would need to subscribe to a web service that holds current data for all phone numbers in the United States and publishes a method to validate such data. I don't think such a service would be free.

Also, take a look at this related question on SO.

Answer 2

Actually I've found something like this : MelissaData.com They're offering a web service which verifies address,phone and name information.