555-1212 is the telephone number one dials in order to reach Directory Assistance in the North American Numbering Plan. If one simply dials it. one gets Directory Assistance for the area code of the originating number. Dialing 1 plus an area code plus 555-1212 will contact Directory Assistance in that area code. Dialing 1-800-555-1212 will contact Directory Assistance for toll-free telephone numbers.
