The international telephone input JavaScript plugin makes it easy to collect phone numbers in your application.
Here are some other resources to get started with Twilio and the international telephone input JavaScript plugin:
- How to build international phone number input in HTML and JavaScript
- How to Validate Phone Number Input in HTML and JavaScript
- A Phone Number Input Field for Flask Forms
- Quick Deploy: international telephone input
Or use Twilio's Quick Deploy to spin up your own international telephone input and validate phone number input in less than 5 minutes (seriously!):

Phone number input is an essential part of many sign up forms that enable use cases like:
- Registering a new account (phone verification)
- Enabling SMS 2FA
- Requesting a callback from customer service
- Signing up for notifications or appointment reminders
I can't wait to see what you build!