All 800 numbers are free to call in the United States. Other toll-free numbers include area codes starting with 844, 855, 866, 877 and 888.
Toll-free numbers are a common choice for businesses who want to offer their clients the option to call customer service for free. All 800 numbers are generally free to call if dialed from a landline phone. Calling an 800 number from a mobile phone may incur additional charges. Toll-free numbers have been in use in the U.S. since the 1960s. The called party pays the charge for calling a toll free number, often via a toll-free subscription to a phone operator.