A toll-free number is a phone number for which the business that owns it, rather than the caller, pays the toll or long-distance charge for each incoming call. Callers may still use plan minutes or pay airtime, roaming, payphone or international-access charges, depending on their service. In the US and Canada, toll-free numbers use prefixes such as 800, 888, 877 and 866, which is why people often call them “800 numbers” whatever the prefix; other countries have their own toll-free ranges. Businesses use them for sales lines, customer support and contact centers, so that callers across the covered area can reach them without paying the toll charge.
At a glance
- The business pays the call charge for inbound calls, usually per minute; callers may still pay their own plan, airtime or roaming costs.
- A toll-free number is not tied to one location; calls can usually be routed to another phone number, a phone system or a contact center, depending on the provider.
- In the US and Canada, each number is managed through a central registry by a responsible organization (RespOrg).
- Toll-free numbers generally work only within their country or region; international callers need other options.
- Routing can change by time of day, caller location or the number dialed, depending on the provider.
What problem it solves
Before cheap long-distance and mobile plans, calling a business in another area cost the caller money, which discouraged sales and support calls. Toll-free numbers moved that cost to the business. They are still widely used because a well-known toll-free number signals a national presence, stays the same as offices and providers change, and gives the business one number to advertise across regions.
For contact centers, a toll-free number is also a routing tool. Several toll-free numbers can point to the same queue while telling the system which campaign or product the caller dialed, so the business can route and report on each one.
How it works
Registry and RespOrg. In the US and Canada, every toll-free number has a record in a central toll-free database, managed by a responsible organization (RespOrg). The record says which carrier or carriers should receive calls to the number, sometimes with rules by caller area or time of day. Your provider is usually the RespOrg or works through one.
Call delivery. When someone dials a toll-free number, the caller’s carrier looks up the record and hands the call to the designated carrier. That carrier delivers it to your phone system over SIP trunks, to a cloud phone or contact center (CCaaS) platform, or onward to an ordinary number.
Dialed number and caller information. Many services deliver the toll-free number the caller dialed (DNIS) so the system can route and greet callers differently for each number. The caller’s number (ANI) is often passed through for routing, reporting and callback, subject to the caller’s privacy settings and the provider’s handling.
Menus and routing. An IVR often answers the toll-free number first and routes the caller to the right team.
Billing. The owning business pays for inbound minutes. Rates may vary by the caller’s location or by whether the call came from a mobile or landline, depending on the provider.
Messaging and caller ID. Some providers let toll-free numbers send and receive text messages, which in the US generally requires verification. In the US, carriers are also required to authenticate caller ID on IP calls, which matters if you show a toll-free number on outbound calls; other countries have their own rules.
When it matters for buyers
- When setting up or moving a contact center, since toll-free numbers usually move with it.
- When toll-free usage charges grow, which is a reason to review rates and routing.
- When changing voice providers, because in the US and Canada toll-free numbers move through a RespOrg change instead of ordinary local porting.
- When launching campaigns that need trackable numbers.
- When expanding to new countries, where a local toll-free or local number may be needed.
Questions to ask vendors
- What is your per-minute rate for inbound toll-free calls, and does it vary by origin or by mobile versus landline?
- Are you a RespOrg, or do you work through one, and how do we move numbers in and out?
- Do you pass the dialed number and caller number to our phone system or contact center?
- Can we set routing by time of day, caller location or for disaster recovery?
- Do you support toll-free texting, and what verification is needed?
- Which countries can you provide toll-free or local numbers in?
- How do you help keep our outbound calls showing a toll-free number from being labeled as spam?
How it differs from a DID
A direct inward dialing (DID) number is an ordinary geographic number, usually assigned to a person, team or main line, and the caller pays whatever their plan charges. With a toll-free number, the business rather than the caller pays the call charge, usually per minute, and the number is not tied to a local area. Many businesses use both, often routing a toll-free number to the same destination as a DID. Moving a DID to a new provider uses local number portability; moving a toll-free number in the US and Canada uses the RespOrg process.
For help with toll-free numbers in a contact center, see our contact center as a service solution page.