Question
Does Zendesk Talk offer Universal International Freephone Numbers (UIFN)?
Answer
No, Zendesk Talk doesn't support UIFN numbers. If your customers are global, purchase toll-free numbers specific to their locale. Otherwise, consider offering other channels of support to your global customer-base such as email or web and mobile messaging.
See the list of available numbers for Talk in the article: Zendesk Talk number availability and pricing along with the number requirements in the article: Zendesk Talk and Zendesk Text number regulatory requirements.