how to check whether a phone number actually exists in US
We have a database of contacts and their phone numbers, and we would like to validate whether these phone numbers actually exists. I googled and did not find any solution. I am looking for one of the following, though I prefer the first option.
Write code using existing phone library to check whether the phone of the contact actually exists. Probably we make the phone ring once or twice
Use an existing software that can be used to ring the phone and validate user contact number manually.
Any help is greatly appreciated.
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