The 866 area code is a toll-free area code in North America, which means that it can be used from any location within the United States, Canada, and other countries that recognize the North American Numbering Plan.

As such, the 866 area code is not assigned to a specific city or geographic location. Instead, it is used by businesses and organizations as a way to provide a free and convenient way for customers and clients to contact them.

When you call a toll-free number that uses the 866 area code, you will not be charged for the call, regardless of where you are calling from. Instead, the business or organization that owns the toll-free number will be responsible for paying for the call.

In summary, the 866 area code is not associated with any particular city, but rather it is used for toll-free numbers that can be accessed from anywhere within the North American Numbering Plan.