Most large companies and corporations that have branches all over the world will have toll free numbers for their US customers and one for their international customers to call the US. Most products you buy for example a television set will have toll free numbers to contact customer service in the US or other countries. For companies to keep in touch with employees who work at other branches in another country they will often dial their International Toll Free Numbers and help save themselves money. If you worked at a place in the Us but your partner company was in the UK they could call you, or you could call them on your international toll free number.