911 is not an ordinary area code for phone calls. When you receive a call starting with what seems to be an area code of 911, it’s most likely a spam call. Phone numbers in the format 911-xxx-xxx do not exist.
911 serves as an officially designated emergency assistance hotline, widely employed across the United States and Canada. It’s categorized as a special-use N11 code managed by the North American Numbering Plan Administrator (NANPA).