There really is no need to because we have made it very easy to paste multiple names and numbers at once into the Call List form.
Yes. When specify the phone numbers to be called in a Call List, multiple alert recipients are called simultaneously. Also the Call List name is included as a parameter in the API Url so your HTTP Notification setup does not change if you change a recipient on the same call list. By contrast, if you specify a single phone number, you’ll have to re-generate your API Url again with the new number, then copy and paste it into the HTTP Notifications setup again. Currently, a re-generation is required if you choose a different call list too.