Gravity Forms: Phone with Extension

You won’t see an option to put an extension with the phone number fields, but you can use the Single Line Text field and check “input mask” and then select the dropdown option for phone number + ext.

When you do this, Gravity Forms will set up a input mask for you. Note: Even if this is a required field, people will be able to submit the form with just the phone number even if they don’t fill out the extension.