In the North American Numbering Plan (NANP), area codes are typically three-digit numbers. They cannot start with: 0 (zero), or 1 (one).
AWhere in North America is area code 170?rea code 170 is not assigned to any region in North America. It’s possible that it may be reserved for future use or assigned to a specific service (e.g., premium rate numbers).
Area code 170 is assigned to the province of Alberta in Canada, specifically overlaying the existing area codes 403, 587, 825, and 368.
