An N11 code or N11 number (said as n-one-one) is a special abbreviated dialing telephone number within the North American Numbering Plan, which allows access to special services. Each of these eight numbers prevents 10,000 telephone numbers (from N11-0000 to N11-9999) from being used. Only non-geographic area codes, such as toll-free 800/888/877/866/855 numbers and 900 numbers may use N11 as the telephone exchange prefix, since the area code must always be dialed for these numbers.
Usage is generally assigned as follows:
- 2-1-1: community services, United Way
- 3-1-1: municipal government services, non-emergency
- 4-1-1: directory assistance
- 5-1-1: traffic information or police non-emergency services
- 6-1-1: telephone company (telco) customer service and repair
- 7-1-1: TDD relay for the deaf
- 8-1-1: underground public utility location, in Canada 8-1-1 is assigned for non-emergency health information and services
- 9-1-1 emergency medical, police, or fire
9-1-1 and 4-1-1 work from nearly every telephone in the U.S. and Canada, while the others vary from place to place. Generally, only 4-1-1 calls incur a fee. 9-1-1 access is mandated by law, even on lines with no service (a "soft" dial tone). 6-1-1 (formerly 8-1-1) may also be accessible to activate service on such lines, and 3-1-1 may be available as well for urgent (but non-emergency) calls to police, or any call to local government in some places.
Other community services are provided through 2-1-1, but only if a non-profit organization such as the United Way operates it locally. Likewise, local or state/provincial government may or may not operate traffic information through 5-1-1. 8-1-1 was made mandatory in the U.S. in 2007, as is 7-1-1. Unlike 9-1-1, these may or may not be available on a phone without paid service.
0-1-1 followed by a country code is used to dial internationally, but this use is not considered an N11 code. 1-1-1 is not available in the NANP, because 11 is the prefix used to access vertical service codes from rotary phones, and is essentially meaningless to the system otherwise.
- See FCC Doc. No. 92-105
- USA.gov FAQ on Use of N11 Service Codes
- NANPA N11 Codes Assignment
- Administered N11 Codes in Canada
- N11 as Regulated and Implemented in Washington State
- The N11 Service Directory of California