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For customers of some telephone companies in Canada and in the U.S., 6-1-1 is the abbreviated dialing telephone number used to report a problem with telephone service, or with a payphone. It is an N11 code of the North American Numbering Plan that are used for special services.
Many landline and mobile phone providers support 6-1-1. Some providers who supply other services, such as Internet or cable television, support these other services with 6-1-1. While 611 has not been officially designated by the FCC, this code receives nearly 74 million calls annually, making it the most frequently used N-1-1 number in the United States.
The 6-1-1 number is not officially assigned by the United States Federal Communications Commission (FCC) or the Canadian Radio-television and Telecommunications Commission (CRTC), but both have chosen not to disturb the assignment as it is generally recognized across the North American Numbering Plan Administration (NANPA).