Checks if a phone number is in the DNC list
curl --request GET \ --url https://api.attent.app/v1/dnc/{phone_number} \ --header 'x-api-key: <api-key>'
{ "phone": "+15555555555", "createdAt": "2024-05-17T21:09:13Z" }
The phone number to check
The phone number in the DNC list
The date and time when the phone number was added to the DNC list
