International Telephone Input is an useful JavaScript jQuery plugin that turns the standard input into an International Telephone Input with a national flag drop down list.
When clicking the drop-down list, it lists all the countries and their international dial codes next to their flags. Ideal for international visitors of your website.
Copy or reference "CountryCode" web-block with depended js/css web-block to use it on your application.
Have fun !
Upgraded in OS 11