I used an API from Numverify.com that can be accessed with http://apilayer.net/api/validate. The purpose of this API is to confirm that a phone number exists and to tell the user where the number is from. A business could use this API for many reasons. They could include it in an app so that when a new user registers, it confirms that the number they submitted is correct/a real number. It could also be used to locate where a customer is if they were to leave a phone number in a voicemail or attached to an email. The website takes the number and then compares it to international number databases to find the where it is from and if it is currently valid. I set up a proof of concept at: https://misdemo.temple.edu/tul19250/Pro%20Points%20Project/
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