An area code prefix for toll free services in the United States. See also 800 Service, area code, and toll free service.
"866." YourDictionary, n.d. Web. 09 April 2019. <https://www.yourdictionary.com/866>.
866. (n.d.). Retrieved April 09th, 2019, from https://www.yourdictionary.com/866
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