What state contains the area code 866?

The 866 area code is not geographically allocated in the North American Numbering Plan. It is among six area codes that are reserved for telephone callers to contact a business or individual without charge.

Besides 866, the other toll-free telephone area codes are 800, 844, 855, 877 and 888. Calls to numbers within each area code are paid by the receiving subscriber.

The Federal Communications Commission regulates toll-free numbers. The FCC rules include a mandate that such numbers be transferred when a subscriber changes service providers, a prohibition on owning more toll-free numbers than is required and a ban on selling toll-free numbers.