QUESTION AND ANSWER
Can someone dial the United States phone number from another country?
Yes, as long as it is not a toll-free number, the United States number can be called from other countries. Because GoToMeeting dial in numbers are not toll free, this may be billed as an international call by the dialer's phone carrier.
GoToMeeting has dial in options for up to 18 countries which can be added to your meetings as needed to allow for a domestic phone call for your attendees.
For information on how to add international numbers to your sessions see the following article: https://support.citrixonline.com/en_US/meeting/knowledge_articles/000032353?title=Adding+International+Numbers+to+a+Meeting%2C+Webinar+or+Training