Validate Phone Number Existence for United States

Question

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.

Don't all numbers in the US start with 555? That's my understand from all the Hollywood movies I've ever seen :-) — paxdiablo, Jul 17 '09 at 08:03

score 2 · Accepted Answer · edited May 23 '17 at 10:32

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.

score 0 · Answer 2 · answered Jul 17 '09 at 17:24

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

answered Jul 17 '09 at 17:24

Tarik

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The home page says: Phone Check: (Coming Soon) – John Saunders Jul 17 '09 at 17:26
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BTW, find out which phone numbers it will validate. Probably only numbers that are in the phone directory. Not _my_ number, for instance, which is a cell phone. – John Saunders Jul 17 '09 at 17:27
Well, actually you're right. I think it's not gonna be possible for me for a while. – Tarik Jul 17 '09 at 17:45
And you are also right about land phone verification. They are not gonna provide cell numbers, I asked them. – Tarik Jul 17 '09 at 17:54

Validate Phone Number Existence for United States

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