Telephone numbers that are free to call from other phone numbers are known as toll-free. Usage charges for a toll-free telephone number are billed to the number's subscriber rather than the caller.
Phone service from a landline or cellphone number is subject to charges, or tolls, based upon the distance from the caller. Toll-free telephone numbers are used by businesses and organizations to allow customers to make contact without incurring tolls for the call. A toll-free telephone number can be obtained by contacting a toll-free provider listed on the SMS/800 website. SMS/800 is the organization that manages toll-free service.
Telephone numbers beginning with 800, 844, 855, 866, 877 or 888 are toll-free.