• https://cdn.bootcdn.net/ajax/libs/intl-tel-input/1.1.0/css/intlTelInput.css
• https://cdn.bootcdn.net/ajax/libs/intl-tel-input/1.1.0/img/flags.png
• https://cdn.bootcdn.net/ajax/libs/intl-tel-input/1.1.0/js/intlTelInput.js
• https://cdn.bootcdn.net/ajax/libs/intl-tel-input/1.1.0/js/intlTelInput.min.js
• https://cdn.bootcdn.net/ajax/libs/intl-tel-input/1.1.0/lib/libphonenumber/build/isValidNumber.js