<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/8.4.6/css/intlTelInput.css"> <h1>International Telephone Input - BOOTSTRAP INPUT GROUP</h1> <form> <div class="form-group"> <input type="tel" class="form-control"> </div> <br> <div class="form-group"> <input type="tel" class="form-control"> </div> </form> <script src="https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/8.4.7/js/intlTelInput.js"></script>

body {padding: 50px;}

$(function () { $('input[type="tel"]').intlTelInput({ utilsScript: "https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/8.4.6/js/utils.js" }); });