A toll-free or 800 number is a special telephone number, in that the called party is charged the cost of the calls by the telephone carrier, instead of the calling party. The cost of the call to the called party is usually based on factors such as the amount of usage the number experiences, the cost of the trunk lines to the facility, and possibly a monthly flat rate service charge. The called party may use a toll-free number because:
- they charge the calling party in another way, such as for technical support calls.
- they make a sale following the call to the toll-free number.
- previous sales were enhanced with the inclusion of toll-free support.
- it improves customer satisfaction by providing free after-sales support in certain products/services.